Add centroid-based query classifier that routes Aurora queries to the
appropriate handler (nav_route, nav_reverse_geocode, direct_answer,
rag_search) before the RAG pipeline runs. Uses TEI embeddings against
pre-computed route centroids from 38 example queries.
- query_router.py: standalone module with lazy centroid init
- query_router_test.py: 7-query test suite (all passing)
- Corresponding recon_rag_tool.py v4.2.0 deployed to Open WebUI DB
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
