Christian Gick ef74d7912e feat: Add cross-encoder re-ranking after hybrid search (CF-1317) ...

Add rerank() function calling LiteLLM /v1/rerank endpoint (Cohere-compatible).
Plugged into all 3 search functions (sessions, session-docs, archives) after
RRF merge. Disabled by default via RERANK_ENABLED env var. Graceful fallback
to RRF-only ranking on API failure.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-19 16:36:24 +02:00

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