Metadata filtering (#124)

* initial pass at PARTITION KEY support.

* Initial pass, allow auxiliary columns on vec0 virtual tables

* update TODO

* Initial pass at metadata filtering

* unit tests

* gha this PR branch

* fixup tests

* doc internal

* fix tests, KNN/rowids in

* define SQLITE_INDEX_CONSTRAINT_OFFSET

* whoops

* update tests, syrupy, use uv

* un ignore pyproject.toml

* dot

* tests/

* type error?

* win: .exe, update error name

* try fix macos python, paren around expr?

* win bash?

* dbg :(

* explicit error

* op

* dbg win

* win ./tests/.venv/Scripts/python.exe

* block UPDATEs on partition key values for now

* test this branch

* accidentally removved "partition key type mistmatch" block during merge

* typo ugh

* bruv

* start aux snapshots

* drop aux shadow table on destroy

* enforce column types

* block WHERE constraints on auxiliary columns in KNN queries

* support delete

* support UPDATE on auxiliary columns

* test this PR

* dont inline that

* test-metadata.py

* memzero text buffer

* stress test

* more snpashot tests

* rm double/int32, just float/int64

* finish type checking

* long text support

* DELETE support

* UPDATE support

* fix snapshot names

* drop not-used in eqp

* small fixes

* boolean comparison handling

* ensure error is raised when long string constraint

* new version string for beta builds

* typo whoops

* ann-filtering-benchmark directory

* test-case

* updates

* fix aux column error when using non-default rowid values, needs test

* refactor some text knn filtering

* rowids blob read only on text metadata filters

* refactor

* add failing test causes for non eq text knn

* text knn NE

* test cases diff

* GT

* text knn GT/GE fixes

* text knn LT/LE

* clean

* vtab_in handling

* unblock aux failures for now

* guard sqlite3_vtab_in

* else in guard?

* fixes and tests

* add broken shadow table test

* rename _metadata_chunksNN shadown table to _metadatachunksNN, for proper shadowName detection

* _metadata_text_NN shadow tables to _metadatatextNN

* SQLITE_VEC_VERSION_MAJOR SQLITE_VEC_VERSION_MINOR and SQLITE_VEC_VERSION_PATCH in sqlite-vec.h

* _info shadow table

* forgot to update aux snapshot?

* fix aux tests

sqlite-vec.h.tmpl

@@ -18,9 +18,16 @@
 #endif
 
 #define SQLITE_VEC_VERSION "v${VERSION}"
+// TODO rm
+#define SQLITE_VEC_VERSION "v-metadata-experiment.01"
 #define SQLITE_VEC_DATE "${DATE}"
 #define SQLITE_VEC_SOURCE "${SOURCE}"
 
+
+#define SQLITE_VEC_VERSION_MAJOR ${VERSION_MAJOR}
+#define SQLITE_VEC_VERSION_MINOR ${VERSION_MINOR}
+#define SQLITE_VEC_VERSION_PATCH ${VERSION_PATCH}
+
 #ifdef __cplusplus
 extern "C" {
 #endif