get_global_driver() now sets _driver_unavailable=True when the initial connection fails, so subsequent calls fail immediately instead of spending 60s retrying each time. Added reset_global_driver() to allow manual reconnection after Neo4j comes back up. Also fixes APP_BOLT_URL in .env: was bolt://bolt.classroomcopilot.ai (public IP, port not exposed), now bolt://192.168.0.209:7687 (LAN). Co-Authored-By: Claude Sonnet 4.6 <[email protected]>