refactor: opencode

src/iai_mcp/migrate.py

@@ -61,10 +61,7 @@ from pathlib import Path
 from typing import Callable, Optional
 from uuid import UUID
 
-import pyarrow as pa
-
 from iai_mcp.crypto import encrypt_field, is_encrypted
-from iai_mcp.embed import Embedder
 from iai_mcp.events import write_event
 from iai_mcp.store import (
     EVENTS_TABLE,
@@ -123,7 +120,7 @@ def _detect_language(text: str) -> str:
 
 def migrate_v1_to_v2(
     store: MemoryStore,
-    embedder: Optional[Embedder] = None,
+    embedder: Optional["Embedder"] = None,
     dry_run: bool = False,
     progress: Optional[Callable[[int, int], None]] = None,
 ) -> dict:
@@ -237,7 +234,7 @@ def migrate_v1_to_v2(
     }
 
 
-def _records_schema_at_dim(dim: int) -> pa.Schema:
+def _records_schema_at_dim(dim: int) -> "pa.Schema":
     """Build the records-table Arrow schema at an explicit embedding dim.
 
     Mirrors `MemoryStore._ensure_tables` lines 249-281 byte-for-byte except
@@ -247,6 +244,7 @@ def _records_schema_at_dim(dim: int) -> pa.Schema:
     is not parameterised on dim. Plan 07.11-03 / file-disjoint
     constraint forbids store.py changes; inlining is the conservative path.
     """
+    import pyarrow as pa
     return pa.schema(
         [
             ("id", pa.string()),