d871c3009d
* feat: support timescale pg_textsearch as text search extension * refactor: deduplicate text search query in retrieve_semantic_bm25_combined Instead of maintaining 3 complete query copies (native, vchord, pg_textsearch), now we: - Build backend-specific parts (score_expr, order_by, where_filter) - Use a single query template with injected backend-specific parts This makes maintenance easier - changes to the semantic CTE or overall structure only need to be made once. |
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