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v1.0.0

release: v1.0.0 — remove Chroma and SQLite, Postgres+pgvector only
@retospect retospect tagged this 24 Apr 18:40 
Breaking change.  The SQLite metadata backend and Chroma vector backend
are both removed — acatome-store now requires Postgres with pgvector.

- StoreConfig: vector_backend/metadata_backend/graph_backend constructor
  args removed (TypeError on use); exposed as read-only properties
  pinned to 'postgres'/'pgvector'/'none' for downstream UI compatibility.
- vector.py: ChromaIndex class deleted; PgVectorIndex is the sole
  concrete backend.  create_index() no longer branches.
- store.py: _init_db raises if db_url is not postgresql+psycopg://…;
  SQLite DDL workarounds (PRAGMA, _ensure_missing_columns dual-branch,
  _ensure_embedding_column Chroma fallback) all gone.
- pyproject.toml: chromadb, llama-index-core, and
  llama-index-vector-stores-chroma dropped.  psycopg[binary] and pgvector
  promoted from optional to base deps.
- Tests: sqlite parametrization removed from conftest; Chroma-specific
  test_vector.py rewritten as PgVectorIndex integration tests; old
  sqlite-legacy-migration test deleted.

Migration one-liner documented in CHANGELOG.md.

145 acatome-store tests + 1361 precis-mcp tests passing against live
Postgres 18.3 + pgvector 0.8.2.
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