{"message":"AI Sales Assistant Backend is running","version":"2.0.0","security":"multi-tenant with JWT authentication","features":["user_authentication","organization_isolation","document_processing","vector_search","real_time_intelligence","websocket_streaming","call_sessions"],"endpoints":{"auth":"/api/v1/auth/signup, /api/v1/auth/login","knowledge_base":"/api/v1/kb/*","realtime":"/api/v1/ws, /api/v1/realtime"}}