Health Check

Health check for monitoring. No authentication required.

Deliberately a sync def, not async: the body does blocking psycopg2 I/O (get_connection/execute/close). An async handler runs directly on the event loop, so a slow or hung DB would block every other request this worker is serving, not just this one. FastAPI dispatches a sync path function to a thread pool instead, which keeps that I/O off the loop.