[NOTICKET][AI] feat(chat): wire Orchestrator -> slow path at the endpoint (env-gated)

[NOTICKET] perf(slow-path): DB3 pre-connect + R4 progress events

[NOTICKET][AI] perf(chat): PR-DB1 - memoizing catalog reader + shared ChatHandler

[KM-631][AI] Langfuse tracing: tokens + latency across the chat pipeline

[KM-582][DED][AI] Fix Retrieval in Agentic Service

feat/Catalog Retrieval System (#1)

[KM-438][KM-439] Improve Retrieval and Querying feature (#15)

Merge dev_new to main (improve retriever and add querying) (#13)

[NOTICKET] fixed single source into multiple sources (#12)

[KM-496] [DED][AI] Fix Response data structure for field sources (db flow)

[NOTICKET] [document]: add doctypes endpoint (#7)

[NOTICKET][DB] add endpoints for dbtypes (#6)

[KM-493] [DED][AI] Fix source extraction in chat

[KM-436][KM-437] add and modify for database and document pipeline (#3)

[NOTICKET] Init db_client endpoint

[KM-467] [DED][AI] Orchestration Agent - Init