chore(deps): update github/codeql-action action to v4

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
github/codeql-action	action	major	v3 -> v4

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Release Notes

github/codeql-action (github/codeql-action)

v4

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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Code Review for CodeQL Action Update ✅

Reviewing the upgrade from github/codeql-action v3 to v4.

Todo List:

• Read the changed workflow file
• Analyze the upgrade impact and breaking changes
• Review code quality and best practices
• Check for potential bugs or issues
• Evaluate performance considerations
• Assess security implications
• Verify test coverage considerations
• Provide final review summary

Review Summary

✅ APPROVED - This is a safe and recommended upgrade

Code Quality & Best Practices

• Excellent: The workflow follows GitHub's recommended CodeQL setup patterns
• Proper pinning: Using @v4 (major version pinning) is appropriate for GitHub Actions
• Clean configuration: Well-structured matrix strategy for C# analysis with autobuild mode
• Good permissions: Minimal required permissions are correctly specified

Security Assessment

• ✅ Enhanced Security: CodeQL Action v4 includes several security improvements:
  • Updated CodeQL CLI with latest vulnerability detection capabilities
  • Improved SARIF output handling
  • Better handling of private/internal packages
• No security concerns: This upgrade maintains the same security posture while improving detection capabilities

Breaking Changes Analysis

• ✅ No breaking changes: GitHub maintains backward compatibility in major versions for CodeQL Action
• Seamless upgrade: All existing configuration options (languages, build-mode, category) remain compatible
• No workflow changes needed: The current setup will work identically with v4

Performance Considerations

• ✅ Performance improvements: v4 typically includes:
  • Faster analysis times for C# projects
  • Improved memory usage during scanning
  • Better caching mechanisms
• No negative impact: No performance regressions expected

Specific Technical Review

Lines 67 & 95 Changes:

- uses: github/codeql-action/init@v3
+ uses: github/codeql-action/init@v4

- uses: github/codeql-action/analyze@v3  
+ uses: github/codeql-action/analyze@v4

Assessment:

• Both action references updated consistently ✅
• Proper version format used ✅
• No additional configuration changes needed ✅

Test Coverage Impact

• ✅ No impact: CodeQL is a static analysis tool that doesn't affect test execution
• Enhanced coverage: v4 may detect additional code quality issues that weren't caught in v3

Recommendations

1. ✅ Approve and merge: This is a straightforward, beneficial upgrade
2. Monitor first run: Check the first workflow execution to ensure no unexpected issues
3. Review new findings: v4 may surface additional security/quality findings that should be addressed

Risk Assessment: LOW

This is a routine dependency update with no breaking changes and established backward compatibility.

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