curl --request GET \
  --url http://localhost:8000/health \
  --header 'Authorization: Bearer <token>'

{
  "status": "healthy",
  "checks": {
    "database": "ok",
    "pubsub": "ok",
    "gcs": "ok"
  },
  "version": "0.1.0",
  "commit_sha": "abc123def456"
}