fix(code-reviews): retry transient wrapper startup failures

[jeanduplessis]

Summary

• Retry code-review fresh-session fallback for observed transient Cloud Agent wrapper-readiness prepareSession 5xx signatures.
• Keep configured-session lookup misses, repo-specific checkout failures, billing failures, and cancelled reviews outside widened retry scope.
• Add structured retry and prepareSession failure classification fields so future alerts can split wrapper startup, sandbox/storage, configured-session, repo, retry outcome, and bot/user sandbox behavior.

Verification

• N/A - no manual verification performed.

Visual Changes

• N/A

Reviewer Notes

• Retry widening stays text-targeted to incident-observed wrapper startup failures rather than treating generic 500 responses as retryable.
• configured session ... not found remains intentionally non-retryable because wrapper startup treats it as continuity loss, not safe transient infra noise.
• Observability changes add stable category fields and retry outcome states intended for future monitor/query refinement.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The incremental commit addresses both previously raised review concerns: the repo-failure guard is now ordered before hasRetryableSandboxMarker (preventing misclassification of repo errors that also carry a 500/sandbox signal), and the timeout string match has been generalized to drop the hardcoded 30000ms value. Tests are updated accordingly.

Incremental Changes Reviewed

• services/cloud-agent-next/src/router/handlers/session-prepare.ts — timeout string match generalized (drop after 30000ms)
• services/code-review-infra/src/code-review-orchestrator.ts — repo-failure guard moved before hasRetryableSandboxMarker
• services/code-review-infra/test/integration/code-review-orchestrator.test.ts — tests updated: repo-failure test uses compound SandboxError message to verify precedence; timeout test uses 45000ms to confirm number is no longer hardcoded

Files Reviewed (4 files — full PR)

• services/cloud-agent-next/src/logger.ts
• services/cloud-agent-next/src/router/handlers/session-prepare.ts
• services/code-review-infra/src/code-review-orchestrator.ts
• services/code-review-infra/test/integration/code-review-orchestrator.test.ts

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_{Reviewed by claude-sonnet-4.6 · 293,626 tokens}

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

[eshurakov]

checked cloud agent side