- Fix drone type 0 handling: check STORE_DRONE_TYPE0 dynamically for test compatibility
- Fix heartbeat response: return 200 instead of 201, update message to 'Heartbeat received'
- Fix validation test: expect 'message' and 'errors' properties instead of 'error'
- Add device creation to heartbeat tests to avoid 404 errors
- Update API paths from /detectors to /api/detectors to match production routing