[Post-Mortem] Sandbox 5xx outage resolved

[yannvr]

What Happened

The sandbox service was experiencing a 5xx outage, returning HTTP 500 responses with the body snippet containing internal error warnings.

Actions Taken

Run the healing runbook for the sandbox service using the heal_service tool.

Verification Evidence

• Healing tool execution result:

  {"healed":true,"was_broken":true,"service":"sandbox"}

• Service verification (get_app_detail):

  {"app": "sandbox", "about": "drill target — a real service the red button really breaks", "http": 200, "bytes": 11, "server": "Google Frontend", "cache": "", "final_url": "https://helm-294160018950.europe-west1.run.app/sandbox", "body_snippet": "sandbox: ok"}

The service is fully restored and operating normally.