{"service": "Watch Data Bridge", "endpoints": {"POST /health": "Save sleep/health data", "POST /sleep": "Save structured sleep data (samples, stages, HRV)", "POST /workout": "Save workout data", "POST /data": "Save both at once", "GET /health": "Recent health data", "GET /sleep": "Recent sleep data with breakdown", "GET /workout": "Recent workouts", "GET /ping": "Health check"}}