🤖 MTC Assistant v21 (Optimized + Impersonate Edition) Status: LINE: OK Gemini AI: OK Firebase: OK Broadcast: OK Performance: Uptime: 6247334s Total Requests: 8404 Total Errors: 0 Avg Response Time: 150.52ms Endpoints: /callback - LINE webhook /healthz - Health check (JSON) /metrics - Performance metrics /stats - Bot statistics