Localize Checks and branch sync feedback

[efraespada]

This PR localizes Check titles and summaries to the effective surface locale while preserving stable Check names, and adds concise localized feedback for explicit branch-sync outcomes. It also strengthens replay-safe publication and legacy English defaults.

What changed

• Localizes human-facing Check titles and summaries for issue, pull request, and repository surfaces while keeping names such as Copilot / Review stable.
• Publishes source-correlated sync-branch replies for aligned, dry-run, and successful merge outcomes without exposing internal execution steps.
• Adds bounded, sanitized rendering for localized Check titles and branch references.
• Expands regression coverage and documents locale behavior, branch-sync feedback, and compatibility expectations.

Review notes

• Stable Check names remain unchanged for branch protection; only human-facing titles and summaries are localized.
• Branch-sync replies are emitted only for successful SyncBranchUseCase results tied to an explicit comment: correlation, with malformed merge successes rejected.

[docs-page]

To preview the documentation for this pull request, visit the following URL:

docs.page/vypdev/copilot~388

Documentation is deployed and generated using docs.page

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.72131% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.03%. Comparing base (274db40) to head (a4db198).
⚠️ Report is 775 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/actions/github_action_completion.ts	94.73%	0 Missing and 1 partial ⚠️
...ion/policies/semantic_result_publication_policy.ts	96.55%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #388      +/-   ##
===========================================
+ Coverage    90.94%   93.03%   +2.08%     
===========================================
  Files          135      656     +521     
  Lines         6251    17486   +11235     
  Branches      1338     4503    +3165     
===========================================
+ Hits          5685    16268   +10583     
- Misses         172      471     +299     
- Partials       394      747     +353     

Files with missing lines	Coverage Δ
...ication/policies/action_summary_message_catalog.ts	100.00% <ø> (ø)
...rc/application/policies/copilot_evidence_policy.ts	100.00% <100.00%> (ø)
...pplication/policies/publication_message_catalog.ts	100.00% <ø> (ø)
src/actions/github_action_completion.ts	95.86% <94.73%> (ø)
...ion/policies/semantic_result_publication_policy.ts	98.17% <96.55%> (ø)

... and 713 files with indirect coverage changes

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[vypbot]

Bugbot: review complete

Current status: No active findings on a4db198.

Pull request · Verified commit · Workflow run