- Replace two-stage keyword + LLM reranking with pure LLM semantic filtering
- Update document matching to send all user documents to LLM for analysis
- LLM now selects 0 to N relevant documents based on actual relevance instead of forced limits
- Rename _llm_verify_document_hashes to _llm_filter_documents for clarity
- Add X-Session-Id header support for improved session tracking in ask_question endpoint
- Update README to reflect simplified document filtering approach
- Add session ID logging for debugging agent thread IDs
- Improve LLM prompt to emphasize quality over quantity in document selection
