Cloud Agent Next - Add logging around ephemeral sandbox destroy and wrapper liveness watchdog

[eshurakov]

Summary

Adds structured logging around ephemeral sandbox lifecycle and wrapper liveness watchdog paths in cloud-agent-next. CloudAgentSession now logs when ephemeral sandbox destroy is scheduled, re-armed, skipped, due, succeeds, or fails; it also forces wrapper stop and schedules destroy on terminal wrapper events for ephemeral code-review sandboxes. wrapper-supervisor now warns when the liveness watchdog stops tracking while accepted messages remain non-terminal, and logs wrapper stop reconciliation.

Verification

N/A

Visual Changes

N/A

Reviewer Notes

N/A

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Reviewed the structured-logging additions for ephemeral sandbox destroy and wrapper liveness watchdog paths; the changes are additive logging plus one behavior-preserving try/catch (error is still rethrown identically), with no security, correctness, or performance concerns found in the changed lines.

Files Reviewed (2 files)

• services/cloud-agent-next/src/persistence/CloudAgentSession.ts
• services/cloud-agent-next/src/session/wrapper-supervisor.ts

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_{Review guidance: REVIEW.md from base branch main}