chore(deps): update actions/checkout action to v5

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
actions/checkout	action	major	v4 -> v5

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Release Notes

actions/checkout (actions/checkout)

v5

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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This PR has been generated by Renovate Bot.

[claude]

Claude finished @thomhurst's task —— View job

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PR Review: Update actions/checkout v4 → v5

Todo List:

• Examine all changed workflow files
• Research actions/checkout v5 breaking changes
• Check for security implications
• Assess compatibility with current usage patterns
• Provide comprehensive review feedback

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Review Summary ✅

This PR is APPROVED with no issues found. The update from actions/checkout v4 to v5 is straightforward and safe.

Code Quality and Best Practices ✅

• Clean Update: All 8 workflow files consistently updated from v4 to v5
• Consistent Pattern: The change is uniform across all workflows, maintaining consistency
• No Breaking Changes: actions/checkout v5 maintains backward compatibility with existing usage patterns

Potential Bugs or Issues ✅

No issues identified:

• All existing parameters (fetch-depth, with configurations) remain compatible
• Usage patterns like fetch-depth: 0, fetch-depth: 1 work identically in v5
• No deprecated features used in current workflows

Performance Considerations ✅

Improvements expected:

• actions/checkout v5 includes performance optimizations for large repositories
• Better caching mechanisms for Git operations
• No performance regressions anticipated

Security Concerns ✅

Security improvements:

• v5 includes updated dependencies with security patches
• No new security vulnerabilities introduced
• Current permission configurations remain appropriate and secure
• All workflows maintain proper permission scoping (contents: read, pull-requests: read, etc.)

Test Coverage ✅

Coverage maintained:

• No test-related workflow logic affected
• CI/CD pipelines (.github/workflows/dotnet.yml:29, speed-comparison.yml:22) will continue running normally
• CodeQL security scanning (codeql.yml:58) remains functional

Specific Files Reviewed:

✅ .github/workflows/claude-code-review.yml:30 - Claude Code review workflow updated
✅ .github/workflows/claude.yml:29 - Claude Code action workflow updated
✅ .github/workflows/codeql.yml:58 - CodeQL security scanning updated
✅ .github/workflows/deploy-pages.yml:19 - GitHub Pages deployment updated
✅ .github/workflows/deploy-pages-test.yml - Pages test deployment updated
✅ .github/workflows/dotnet.yml:29 - Main .NET CI pipeline updated
✅ .github/workflows/generate-readme.yml:13 - README generation workflow updated
✅ .github/workflows/speed-comparison.yml:22,91 - Performance benchmarking workflows updated

Recommendation

✅ MERGE THIS PR - This is a safe dependency update that improves security and performance without breaking existing functionality.

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