{"service":"scene-gateway","note":"이것은 백엔드 API 서버입니다. 화면 UI는 고객웹(:5173)·관리자웹(:5174).","endpoints":{"health":"GET /health","ingest_event":"POST /ingest/event (x-esp-token)","ingest_snapshot":"POST /ingest/snapshot (multipart)","chat":"POST /chat","admin_sessions":"GET /admin/sessions","admin_flags":"GET /admin/flags","call_token":"POST /calls/token (LiveKit 통화 토큰)","ws":"GET /ws (WebSocket)"}}