Triage: crash reporting / observability baseline

[ComfyChloe]

Part of the ARC-OSC workboard triage track.

What's needed

Pick a crash-reporting / observability approach for the Electron client: local crash logs, a lightweight reporter, or a hosted sink.

Scope

• Decide crash capture mechanism (main + renderer)
• Decide where logs land (local file, optional upload)
• Define the minimal set of health/heartbeat signals worth recording
• Write the decision down before implementing

Acceptance criteria

• A written triage decision exists for crash capture and log destination
• Follow-up implementation issue(s) created from the decision

Out of scope: implementing the reporter itself (separate issue after triage).