youhuanghe fe5ce68436 feat(vector): add full-text and hybrid search support for Chroma backend ...

- Implement full-text search via Chroma's $contains filter
  - Implement hybrid search with RRF (Reciprocal Rank Fusion) combining
    vector and full-text results, with min-max normalized distances
  - Fix add_embeddings to use col.upsert instead of col.add for idempotency
  - Bump chromadb dependency to >=1.0.0,<2.0.0
  - Re-lock uv.lock with official PyPI source

2026-03-11 03:59:14 +00:00

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