refactor(filesystem): unify pifs metadata state

This commit is contained in:
BukeLy 2026-05-26 17:12:59 +08:00
parent fc0be1aeee
commit 7c021a7dd0
8 changed files with 479 additions and 324 deletions

View file

@ -47,7 +47,7 @@ DEFAULT_METADATA_GENERATION_FIELDS = {
"relation": False,
}
DEFAULT_DERIVED_METADATA_FIELD_TYPES = {
DEFAULT_METADATA_FIELD_TYPES = {
"summary": "string",
"doc_type": "string",
"domain": "string",
@ -56,7 +56,8 @@ DEFAULT_DERIVED_METADATA_FIELD_TYPES = {
"relation": "string",
}
METADATA_GENERATION_STATUSES = {
METADATA_STATUSES = {
"skipped",
"pending_submit",
"pending_generate",
"generated",
@ -128,9 +129,8 @@ class PageIndexFileSystem:
content: str = "",
content_type: str = "text/plain",
source_type: Optional[str] = None,
derived_metadata: Optional[dict[str, Any]] = None,
metadata_generation_policy: Optional[dict[str, Any]] = None,
metadata_generation_status: Optional[str] = None,
metadata_policy: Optional[dict[str, Any]] = None,
metadata_status: Optional[str] = None,
) -> str:
return self.register_files(
[
@ -144,15 +144,14 @@ class PageIndexFileSystem:
"content": content,
"content_type": content_type,
"source_type": source_type,
"derived_metadata": derived_metadata,
"metadata_generation_policy": metadata_generation_policy,
"metadata_generation_status": metadata_generation_status,
"metadata_policy": metadata_policy,
"metadata_status": metadata_status,
}
]
)[0]
def register(self, **kwargs: Any) -> str:
if not self._register_uses_deferred_metadata(kwargs.get("metadata_generation_policy")):
if not self._register_uses_deferred_metadata(kwargs.get("metadata_policy")):
self._ensure_register_completion_defaults()
return self.register_file(**kwargs)
@ -171,7 +170,7 @@ class PageIndexFileSystem:
raise MetadataGenerationError(
"metadata_generator is required to generate pending PIFS metadata"
)
rows = self.store.list_pending_metadata_generation(limit=limit)
rows = self.store.list_pending_metadata_status(limit=limit)
generated = 0
failed = 0
file_refs: list[str] = []
@ -180,14 +179,14 @@ class PageIndexFileSystem:
self._generate_register_metadata(record, force=True)
self._complete_summary_projection_index(record)
self._register_generation_policy_schema([record])
self.store.update_file_metadata_generation(
self.store.update_file_metadata_status(
record["file_ref"],
derived_metadata=record["derived_metadata"],
metadata_generation=record["metadata_generation"],
metadata=record["metadata"],
metadata_status=record["metadata_status"],
)
self._sync_owned_raw_artifact(record)
file_refs.append(record["file_ref"])
if record["metadata_generation"]["status"] == "failed":
if record["metadata_status"]["status"] == "failed":
failed += 1
else:
generated += 1
@ -283,7 +282,7 @@ class PageIndexFileSystem:
return bool(policy.get("batch")) or policy.get("mode") == "batch"
@classmethod
def default_metadata_generation_policy(cls) -> dict[str, Any]:
def default_metadata_policy(cls) -> dict[str, Any]:
return {
"fields": dict(DEFAULT_METADATA_GENERATION_FIELDS),
"projection_indexes": {"summary": True},
@ -459,8 +458,7 @@ class PageIndexFileSystem:
folder_path=folder_path,
folder_paths=folder_paths,
metadata=row["metadata"],
derived_metadata=row["derived_metadata"],
metadata_generation=row["metadata_generation"],
metadata_status=row["metadata_status"],
source_path=row["source_path"],
id=row["id"],
document_id=row["document_id"],
@ -885,11 +883,18 @@ class PageIndexFileSystem:
raw_source_path = str(file["source_path"])
source_path = raw_source_path.strip("/")
metadata = file.get("metadata") or {}
derived_metadata = file.get("derived_metadata") or {}
if not isinstance(metadata, dict):
raise ValueError("metadata must be a JSON object")
if not isinstance(derived_metadata, dict):
raise ValueError("derived_metadata must be a JSON object")
legacy_value_key = "derived_" + "metadata"
legacy_policy_key = "metadata_" + "generation_policy"
legacy_status_key = "metadata_" + "generation_status"
if legacy_value_key in file:
raise ValueError("legacy generated metadata map has been removed; put values in metadata")
if legacy_policy_key in file:
raise ValueError("legacy metadata policy key has been renamed to metadata_policy")
if legacy_status_key in file:
raise ValueError("legacy metadata status key has been renamed to metadata_status")
self._validate_register_metadata(metadata)
external_id = file.get("external_id")
content = file.get("content") or ""
content_type = file.get("content_type") or "text/plain"
@ -907,21 +912,17 @@ class PageIndexFileSystem:
)
fts_content = file.get("fts_content", artifact_content)
source_type = file.get("source_type") or self._infer_source_type(source_path)
generation_policy = self._normalize_metadata_generation_policy(
file.get("metadata_generation_policy"),
derived_metadata=derived_metadata,
metadata_policy = self._normalize_metadata_policy(
file.get("metadata_policy"),
metadata=metadata,
)
generation_state = self._metadata_generation_state(
generation_policy,
derived_metadata=derived_metadata,
status=file.get("metadata_generation_status"),
metadata_status = self._metadata_status_state(
metadata_policy,
metadata=metadata,
status=file.get("metadata_status"),
)
indexed_metadata = SQLiteFileSystemStore.indexed_metadata_values(
metadata,
derived_metadata,
generation_state,
)
searchable_metadata = self._merge_metadata_values(metadata, derived_metadata)
indexed_metadata = SQLiteFileSystemStore.indexed_metadata_values(metadata)
searchable_metadata = dict(metadata)
folder_path = normalize_path(file.get("folder_path") or "/")
title = file.get("title") or metadata.get("title") or Path(source_path).stem
file_ref = make_file_ref(external_id or source_path)
@ -938,8 +939,7 @@ class PageIndexFileSystem:
source_path=source_path,
folder_path=folder_path,
metadata=metadata,
derived_metadata=derived_metadata,
metadata_generation=generation_state,
metadata_status=metadata_status,
),
)
descriptor = self._build_descriptor(title, metadata)
@ -959,10 +959,8 @@ class PageIndexFileSystem:
"pageindex_tree_status": pageindex_tree_status,
"metadata": metadata,
"metadata_json": json.dumps(metadata, ensure_ascii=False),
"derived_metadata": derived_metadata,
"derived_metadata_json": json.dumps(derived_metadata, ensure_ascii=False),
"metadata_generation": generation_state,
"metadata_generation_json": json.dumps(generation_state, ensure_ascii=False),
"metadata_status": metadata_status,
"metadata_status_json": json.dumps(metadata_status, ensure_ascii=False),
"indexed_metadata": indexed_metadata,
"metadata_text": metadata_text(searchable_metadata),
"folder_path": folder_path,
@ -1035,16 +1033,14 @@ class PageIndexFileSystem:
source_path: str,
folder_path: str,
metadata: dict[str, Any],
derived_metadata: dict[str, Any],
metadata_generation: dict[str, Any],
metadata_status: dict[str, Any],
) -> dict[str, Any]:
return {
"storage_uri": storage_uri,
"source_path": source_path,
"folder_path": folder_path,
"metadata": metadata,
"derived_metadata": derived_metadata,
"metadata_generation": metadata_generation,
"metadata_status": metadata_status,
}
def _sync_owned_raw_artifact(self, record: dict[str, Any]) -> None:
@ -1064,22 +1060,21 @@ class PageIndexFileSystem:
source_path=record["source_path"],
folder_path=record["folder_path"],
metadata=record["metadata"],
derived_metadata=record["derived_metadata"],
metadata_generation=record["metadata_generation"],
metadata_status=record["metadata_status"],
),
)
)
def _record_from_file_entry(self, entry: Any) -> dict[str, Any]:
content = self.store.read_text(entry.file_ref)
generation_policy = self._normalize_metadata_generation_policy(
entry.metadata_generation.get("policy", {}),
derived_metadata=entry.derived_metadata,
metadata_policy = self._normalize_metadata_policy(
entry.metadata_status.get("policy", {}),
metadata=entry.metadata,
)
generation_state = self._metadata_generation_state(
generation_policy,
derived_metadata=entry.derived_metadata,
status=entry.metadata_generation.get("status"),
metadata_status = self._metadata_status_state(
metadata_policy,
metadata=entry.metadata,
status=entry.metadata_status.get("status"),
)
return {
"file_ref": entry.file_ref,
@ -1097,35 +1092,29 @@ class PageIndexFileSystem:
"pageindex_tree_status": entry.pageindex_tree_status,
"metadata": dict(entry.metadata),
"metadata_json": json.dumps(entry.metadata, ensure_ascii=False),
"derived_metadata": dict(entry.derived_metadata),
"derived_metadata_json": json.dumps(entry.derived_metadata, ensure_ascii=False),
"metadata_generation": generation_state,
"metadata_generation_json": json.dumps(generation_state, ensure_ascii=False),
"indexed_metadata": SQLiteFileSystemStore.indexed_metadata_values(
entry.metadata,
entry.derived_metadata,
generation_state,
),
"metadata_text": metadata_text(self._merge_metadata_values(entry.metadata, entry.derived_metadata)),
"metadata_status": metadata_status,
"metadata_status_json": json.dumps(metadata_status, ensure_ascii=False),
"indexed_metadata": SQLiteFileSystemStore.indexed_metadata_values(entry.metadata),
"metadata_text": metadata_text(entry.metadata),
"folder_path": entry.folder_path,
"content": content,
"skip_fts": False,
}
def _generate_register_metadata(self, record: dict[str, Any], *, force: bool = False) -> None:
generation = record["metadata_generation"]
policy = generation.get("policy", {})
if self._metadata_generation_is_batch(policy) and not force:
status = record["metadata_status"]
policy = status.get("policy", {})
if self._metadata_policy_is_batch(policy) and not force:
self._mark_requested_generation_status(record, "pending_submit")
return
fields = self._metadata_fields_to_generate(record)
if not fields:
return
if self.metadata_generator is None:
if self._metadata_generation_requires_sync(policy):
if self._metadata_policy_requires_sync(policy):
raise MetadataGenerationError(
"metadata_generator is required for synchronous PIFS metadata generation; "
"set metadata_generation_policy batch=true to defer"
"set metadata_policy batch=true to defer"
)
return
try:
@ -1146,112 +1135,117 @@ class PageIndexFileSystem:
if isinstance(result, dict):
result = MetadataGenerationResult(values=result)
except Exception as exc:
self._apply_metadata_generation_failures(record, fields, str(exc))
self._apply_metadata_status_failures(record, fields, str(exc))
return
failures = dict(result.failures)
for field in fields:
if field in result.values:
record["derived_metadata"][field] = result.values[field]
generation["fields"][field] = {"requested": True, "status": "generated"}
record["metadata"][field] = result.values[field]
status["fields"][field] = {
"requested": True,
"status": "generated",
"owner": "pifs",
"source": "llm",
}
else:
failures.setdefault(field, "metadata generator did not return field")
for field, reason in failures.items():
generation["fields"][field] = {
status["fields"][field] = {
"requested": True,
"status": "failed",
"owner": "pifs",
"source": "llm",
"error": str(reason),
}
self._refresh_record_metadata_generation(record)
self._refresh_record_metadata_status(record)
def _complete_summary_projection_index(self, record: dict[str, Any]) -> None:
generation = record["metadata_generation"]
summary_index = generation.get("projection_indexes", {}).get("summary")
metadata_status = record["metadata_status"]
summary_index = metadata_status.get("projection_indexes", {}).get("summary")
if not summary_index or not summary_index.get("requested"):
return
summary = str(record.get("derived_metadata", {}).get("summary") or "").strip()
summary = str(record.get("metadata", {}).get("summary") or "").strip()
if not summary:
return
if self.summary_projection_indexer is None:
self._refresh_record_metadata_generation(record)
self._refresh_record_metadata_status(record)
return
try:
result = self.summary_projection_indexer.upsert_summary(record)
except Exception as exc:
summary_index["status"] = "failed"
summary_index["error"] = str(exc)
self._refresh_record_metadata_generation(record)
self._refresh_record_metadata_status(record)
return
summary_index.clear()
summary_index.update({"requested": True, **result})
if summary_index.get("status") != "ready":
summary_index["status"] = "ready"
self._refresh_record_metadata_generation(record)
self._refresh_record_metadata_status(record)
@staticmethod
def _metadata_generation_is_batch(policy: dict[str, Any]) -> bool:
def _metadata_policy_is_batch(policy: dict[str, Any]) -> bool:
return bool(policy.get("batch")) or policy.get("mode") == "batch"
@staticmethod
def _metadata_generation_requires_sync(policy: dict[str, Any]) -> bool:
def _metadata_policy_requires_sync(policy: dict[str, Any]) -> bool:
return policy.get("batch") is False or policy.get("mode") == "sync"
def _metadata_fields_to_generate(self, record: dict[str, Any]) -> list[str]:
fields: list[str] = []
for name, state in record["metadata_generation"].get("fields", {}).items():
for name, state in record["metadata_status"].get("fields", {}).items():
if not state.get("requested"):
continue
if state.get("status") == "generated" and name in record["derived_metadata"]:
if state.get("status") == "generated" and name in record["metadata"]:
continue
fields.append(name)
return fields
def _mark_requested_generation_status(self, record: dict[str, Any], status: str) -> None:
for name, field in record["metadata_generation"].get("fields", {}).items():
for name, field in record["metadata_status"].get("fields", {}).items():
if field.get("requested") and field.get("status") != "generated":
record["metadata_generation"]["fields"][name] = {
record["metadata_status"]["fields"][name] = {
"requested": True,
"status": status,
"owner": "pifs",
"source": "llm",
}
self._refresh_record_metadata_generation(record, explicit_status=status)
self._refresh_record_metadata_status(record, explicit_status=status)
def _apply_metadata_generation_failures(
def _apply_metadata_status_failures(
self,
record: dict[str, Any],
fields: list[str],
reason: str,
) -> None:
for field in fields:
record["metadata_generation"]["fields"][field] = {
record["metadata_status"]["fields"][field] = {
"requested": True,
"status": "failed",
"owner": "pifs",
"source": "llm",
"error": reason,
}
self._refresh_record_metadata_generation(record, explicit_status="failed")
self._refresh_record_metadata_status(record, explicit_status="failed")
def _refresh_record_metadata_generation(
def _refresh_record_metadata_status(
self,
record: dict[str, Any],
*,
explicit_status: str | None = None,
) -> None:
generation = record["metadata_generation"]
metadata_status = record["metadata_status"]
statuses = [
field.get("status")
for field in generation.get("fields", {}).values()
for field in metadata_status.get("fields", {}).values()
if field.get("requested") and field.get("status")
]
generation["status"] = explicit_status or self._aggregate_generation_status(statuses)
self._refresh_projection_index_statuses(generation, record["derived_metadata"])
record["derived_metadata_json"] = json.dumps(record["derived_metadata"], ensure_ascii=False)
record["metadata_generation_json"] = json.dumps(generation, ensure_ascii=False)
record["indexed_metadata"] = SQLiteFileSystemStore.indexed_metadata_values(
record["metadata"],
record["derived_metadata"],
generation,
)
record["metadata_text"] = metadata_text(
self._merge_metadata_values(record["metadata"], record["derived_metadata"])
)
metadata_status["status"] = explicit_status or self._aggregate_metadata_status(statuses)
self._refresh_projection_index_statuses(metadata_status, record["metadata"])
record["metadata_json"] = json.dumps(record["metadata"], ensure_ascii=False)
record["metadata_status_json"] = json.dumps(metadata_status, ensure_ascii=False)
record["indexed_metadata"] = SQLiteFileSystemStore.indexed_metadata_values(record["metadata"])
record["metadata_text"] = metadata_text(record["metadata"])
def _open_lines(self, file_ref: str, start: int, end: int) -> OpenResult:
entry = self.store.get_file(file_ref)
@ -1381,8 +1375,7 @@ class PageIndexFileSystem:
folder_path=folder_path,
folder_paths=folder_paths,
metadata=entry.metadata,
derived_metadata=entry.derived_metadata,
metadata_generation=entry.metadata_generation,
metadata_status=entry.metadata_status,
source_path=entry.source_path,
id=entry.external_id or file_ref,
document_id=entry.external_id,
@ -1403,31 +1396,49 @@ class PageIndexFileSystem:
source = metadata.get("source_type") or metadata.get("repo") or metadata.get("channel")
return f"{title} ({source})" if source else title
@staticmethod
def _validate_register_metadata(metadata: dict[str, Any]) -> None:
pifs_owned_fields = set(DEFAULT_METADATA_GENERATION_FIELDS)
conflicts = sorted(pifs_owned_fields.intersection(metadata))
if conflicts:
raise ValueError(
"metadata contains PIFS-owned generated field(s): "
+ ", ".join(conflicts)
+ "; configure metadata_policy instead of passing generated fields"
)
def _register_generation_policy_schema(self, records: list[dict[str, Any]]) -> None:
fields: dict[str, dict[str, str]] = {}
pifs_fields: dict[str, dict[str, str]] = {}
user_fields: dict[str, dict[str, str]] = {}
for record in records:
policy_fields = record["metadata_generation"]["policy"]["fields"]
policy_fields = record["metadata_status"]["policy"]["fields"]
generated_names = {str(name) for name, requested in policy_fields.items() if requested}
for name, requested in policy_fields.items():
if requested:
fields[name] = {
"type": DEFAULT_DERIVED_METADATA_FIELD_TYPES.get(
pifs_fields[name] = {
"type": DEFAULT_METADATA_FIELD_TYPES.get(
name,
self._infer_metadata_field_type(
record.get("derived_metadata", {}).get(name)
record.get("metadata", {}).get(name)
),
)
}
for name, value in record.get("derived_metadata", {}).items():
fields.setdefault(name, {"type": self._infer_metadata_field_type(value)})
if fields:
self.metadata.register_schema({"fields": fields}, source="derived")
for name, value in record.get("metadata", {}).items():
if name in generated_names:
pifs_fields.setdefault(name, {"type": self._infer_metadata_field_type(value)})
else:
user_fields.setdefault(name, {"type": self._infer_metadata_field_type(value)})
if pifs_fields:
self.metadata.register_schema({"fields": pifs_fields}, source="pifs")
if user_fields:
self.metadata.register_schema({"fields": user_fields}, source="user")
@classmethod
def _normalize_metadata_generation_policy(
def _normalize_metadata_policy(
cls,
policy: Optional[dict[str, Any]],
*,
derived_metadata: dict[str, Any],
metadata: dict[str, Any],
) -> dict[str, Any]:
fields = dict(DEFAULT_METADATA_GENERATION_FIELDS)
field_statuses: dict[str, str] = {}
@ -1438,7 +1449,7 @@ class PageIndexFileSystem:
top_level_status = None
if policy is not None:
if not isinstance(policy, dict):
raise ValueError("metadata_generation_policy must be a JSON object")
raise ValueError("metadata_policy must be a JSON object")
raw_fields = policy.get("fields")
if raw_fields is None:
raw_fields = {
@ -1447,7 +1458,7 @@ class PageIndexFileSystem:
if name not in {"batch", "mode", "status", "projection_indexes"}
}
if not isinstance(raw_fields, dict):
raise ValueError("metadata_generation_policy fields must be a JSON object")
raise ValueError("metadata_policy fields must be a JSON object")
for name, declaration in raw_fields.items():
name = str(name)
if isinstance(declaration, bool):
@ -1459,7 +1470,7 @@ class PageIndexFileSystem:
)
field_status = declaration.get("status")
if field_status is not None:
cls._validate_metadata_generation_status(str(field_status))
cls._validate_metadata_status(str(field_status))
field_statuses[name] = str(field_status)
continue
raise ValueError(f"Invalid metadata generation policy for field: {name}")
@ -1470,13 +1481,11 @@ class PageIndexFileSystem:
batch = True
top_level_status = policy.get("status")
if top_level_status is not None:
cls._validate_metadata_generation_status(str(top_level_status))
cls._validate_metadata_status(str(top_level_status))
if "projection_indexes" in policy:
projection_indexes, projection_index_statuses = (
cls._normalize_projection_index_policy(policy["projection_indexes"])
)
for name in derived_metadata:
fields.setdefault(name, True)
normalized: dict[str, Any] = {
"fields": fields,
"projection_indexes": (
@ -1498,36 +1507,46 @@ class PageIndexFileSystem:
return normalized
@classmethod
def _metadata_generation_state(
def _metadata_status_state(
cls,
policy: dict[str, Any],
*,
derived_metadata: dict[str, Any],
metadata: dict[str, Any],
status: Optional[str],
) -> dict[str, Any]:
explicit_status = status or policy.get("status")
if explicit_status is not None:
explicit_status = str(explicit_status)
cls._validate_metadata_generation_status(explicit_status)
cls._validate_metadata_status(explicit_status)
field_statuses = policy.get("field_statuses", {})
fields: dict[str, dict[str, Any]] = {}
for name, requested in policy["fields"].items():
if not requested:
fields[name] = {"requested": False}
fields[name] = {
"requested": False,
"status": "skipped",
"owner": "pifs",
"source": "llm",
}
continue
field_status = field_statuses.get(name)
if field_status is None:
field_status = explicit_status
if field_status is None:
field_status = "generated" if name in derived_metadata else "pending_generate"
fields[name] = {"requested": True, "status": field_status}
field_status = "generated" if name in metadata else "pending_generate"
fields[name] = {
"requested": True,
"status": field_status,
"owner": "pifs",
"source": "llm",
}
requested_statuses = [
item["status"]
for item in fields.values()
if item.get("requested") and item.get("status")
]
aggregate_status = explicit_status or cls._aggregate_generation_status(requested_statuses)
aggregate_status = explicit_status or cls._aggregate_metadata_status(requested_statuses)
policy_summary = {
"fields": dict(policy["fields"]),
"projection_indexes": dict(policy.get("projection_indexes", {})),
@ -1549,12 +1568,14 @@ class PageIndexFileSystem:
state["projection_indexes"][name] = {
"requested": True,
"status": projection_statuses.get(name, "not_indexed"),
"owner": "pifs",
"source": "index",
}
cls._refresh_projection_index_statuses(state, derived_metadata)
cls._refresh_projection_index_statuses(state, metadata)
return state
@staticmethod
def _aggregate_generation_status(statuses: list[str]) -> str:
def _aggregate_metadata_status(statuses: list[str]) -> str:
if not statuses:
return "generated"
for status in ("failed", "pending_submit", "pending_generate"):
@ -1563,9 +1584,9 @@ class PageIndexFileSystem:
return "generated"
@staticmethod
def _validate_metadata_generation_status(status: str) -> None:
if status not in METADATA_GENERATION_STATUSES:
raise ValueError(f"Unsupported metadata generation status: {status}")
def _validate_metadata_status(status: str) -> None:
if status not in METADATA_STATUSES:
raise ValueError(f"Unsupported metadata status: {status}")
@classmethod
def _normalize_projection_index_policy(
@ -1575,7 +1596,7 @@ class PageIndexFileSystem:
if projection_policy is None:
return {}, {}
if not isinstance(projection_policy, dict):
raise ValueError("metadata_generation_policy projection_indexes must be a JSON object")
raise ValueError("metadata_policy projection_indexes must be a JSON object")
projection_indexes: dict[str, bool] = {}
projection_index_statuses: dict[str, str] = {}
for name, declaration in projection_policy.items():
@ -1604,43 +1625,17 @@ class PageIndexFileSystem:
@classmethod
def _refresh_projection_index_statuses(
cls,
generation: dict[str, Any],
derived_metadata: dict[str, Any],
metadata_status: dict[str, Any],
metadata: dict[str, Any],
) -> None:
summary_index = generation.get("projection_indexes", {}).get("summary")
summary_index = metadata_status.get("projection_indexes", {}).get("summary")
if not summary_index or not summary_index.get("requested"):
return
if "summary" not in derived_metadata:
if "summary" not in metadata:
return
if summary_index.get("status", "not_indexed") == "not_indexed":
summary_index["status"] = "pending_index"
@classmethod
def _merge_metadata_values(
cls,
metadata: dict[str, Any],
derived_metadata: dict[str, Any],
) -> dict[str, Any]:
merged = dict(metadata)
for name, value in derived_metadata.items():
if name not in merged:
merged[name] = value
continue
if merged[name] == value:
continue
merged[name] = cls._merge_metadata_value(merged[name], value)
return merged
@staticmethod
def _merge_metadata_value(raw_value: Any, derived_value: Any) -> Any:
values = raw_value if isinstance(raw_value, list) else [raw_value]
derived_values = derived_value if isinstance(derived_value, list) else [derived_value]
merged = list(values)
for item in derived_values:
if item not in merged:
merged.append(item)
return merged
@staticmethod
def _infer_metadata_field_type(value: Any) -> str:
if isinstance(value, bool):