Check for updates now

Force a fresh check against the update server (the GET serves a cached status) and return the new status. Automatic checks run at startup, every 55 to 60 minutes, and when overdue after wake or restored connectivity. Concurrent checks join one request. A network failure retains a previously found update. Requires the **viewer** role; remains available while locked. Local developer builds and configurations with updates disabled do not contact the backend.

curl -X POST "https://example.com/api/updates/check"

{  "operation": {    "id": "string",    "target": "string",    "phase": "preparing",    "error": "string",    "recoveryAvailable": true,    "previousTransactionID": "string"  },  "current": "string",  "commit": "string",  "available": true,  "latestVersion": "string",  "notes": "string",  "url": "http://example.com",  "checkFailed": true,  "reason": "unreachable",  "devMode": true}