fix(code-review): normalize unavailable-model cancellations

[eshurakov]

Summary

• Normalize Cloud Agent Next preflight unavailable-model failures into the existing Code Review cancelled / model_not_found path instead of disabling Code Reviewer.
• Preserve team-policy model restrictions as failed / selected_model_unavailable action-required failures with the existing disable flow.
• Add a shared web-layer unavailable-model classifier used by callback normalization, ambiguous-dispatch recovery, admin telemetry, and alerting compatibility; keep the worker-side equivalent narrow and local across the service boundary.
• Reclassify historical preflight rows in reporting and operational alerting without a database migration or producer-message change.

Verification

• Manual verification was not performed because this is a backend-only state-classification change with no interactive UI path.
• Add any additional manual verification details.

Visual Changes

N/A

Reviewer Notes

• Rolling-deploy compatibility is intentional: older workers may still report failed / selected_model_unavailable with the exact preflight message, and the web layer normalizes those payloads.
• Existing Code Reviewer configurations disabled by the previous behavior are not automatically re-enabled; any repair should be handled separately.
• Ambiguous-dispatch recovery intentionally normalizes persistence only. Provider-summary publication remains callback-route-owned and can be hardened in a separate follow-up.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The PR correctly reclassifies preflight unavailable-model failures as cancelled/model_not_found across all three enforcement layers (worker, callback route, ambiguous-dispatch recovery), with SQL retroactive reclassification consistently applied and comprehensive test coverage for both the new path and the preserved team-policy selected_model_unavailable path.

Files Reviewed (9 files)

• apps/web/src/lib/code-reviews/model-unavailable.ts — new shared classifier
• apps/web/src/lib/code-reviews/model-unavailable.test.ts — unit tests
• apps/web/src/lib/code-reviews/action-required.ts — preflight message removed from classifier
• apps/web/src/lib/code-reviews/action-required.test.ts — updated tests
• apps/web/src/app/api/internal/code-review-status/[reviewId]/route.ts — callback normalization
• apps/web/src/app/api/internal/code-review-status/[reviewId]/route.test.ts — callback tests
• apps/web/src/lib/code-reviews/alerting/detectors.ts — alerting SQL filter
• apps/web/src/lib/code-reviews/alerting/detectors.test.ts — alerting tests
• apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.ts — ambiguous-dispatch recovery
• apps/web/src/lib/code-reviews/dispatch/dispatch-pending-reviews.test.ts — dispatch tests
• apps/web/src/routers/admin-code-reviews-router.ts — admin reporting SQL
• apps/web/src/routers/admin-code-reviews-router.test.ts — admin reporting tests
• services/code-review-infra/src/code-review-orchestrator.ts — worker-side classification
• services/code-review-infra/test/integration/code-review-orchestrator.test.ts — integration tests

Fix these issues in Kilo Cloud

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_{Reviewed by claude-sonnet-4.6 · 983,426 tokens}

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