{"service":"HR Assistant API","status":"Backend is running","version":"4.0 — RAG + Multi-signal Escalation + Bot Framework + WebSockets","knowledge_base":{"total_chunks":0,"status":"empty"},"active_sessions":0,"endpoints":{"health":"/health","diagnostics":"/test-teams","chat":"POST /chat","escalate":"POST /escalate","upload":"POST /documents/upload","doc_status":"GET /documents/status","sharepoint_files":"GET /sharepoint/files","sharepoint_sync":"POST /sharepoint/sync","active_sessions":"GET /active-sessions","ws_user":"/ws/user/{session_id}","ws_agent":"/ws/agent/{session_id}"}}