- Add faiss-cpu, rank-bm25, sentence-transformers, numpy to requirements.txt.
(previously only pymupdf was listed; other deps were manual-install only)
- Cast score to float() before round() to avoid numpy type serialization errors.
- Pass expected_standards through _format_result for eval script compatibility.
- Update retrieval_results.json with expected_standards per query for eval.
Kshitij
