chore(deps): update dependency actions/checkout to v4.3.1

[renovate]

This PR contains the following updates:

Package	Update	Change
actions/checkout	patch	v4.3.0 -> v4.3.1

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Release Notes

actions/checkout (actions/checkout)

v4.3.1

Compare Source

What's Changed

• Port v6 cleanup to v4 by @​ericsciple in #​2305

Full Changelog: actions/checkout@v4...v4.3.1

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Configuration

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

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, 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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• If you want to rebase/retry this PR, check this box

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This PR was generated by Mend Renovate. View the repository job log.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.12%. Comparing base (8f8dc82) to head (17f8265).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #136   +/-   ##
=======================================
  Coverage   98.12%   98.12%           
=======================================
  Files          15       15           
  Lines         586      586           
=======================================
  Hits          575      575           
  Misses         11       11           

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[github-actions]

Renovate PR Review Results

⚖️ Safety Assessment: ✅ Safe

🔍 Release Content Analysis

• Single change: "Port v6 cleanup to v4" - maintenance/cleanup update to improve compatibility between different checkout action versions
• Breaking changes: None identified - this is a patch version update focused on internal cleanup
• Security fixes: No explicit security fixes mentioned in release notes
• New environment variable: Added ACTIONS_CHECKOUT_SKIP_V6_CLEANUP for users who need to disable the new cleanup logic
• Scope: Minimal code changes focused on cleanup logic and version compatibility

🎯 Impact Scope Investigation

• Usage locations identified:
  • .github/workflows/_helpers.ts:11 - Used in setupJob() helper function with action("actions/checkout")
  • .github/workflows/ci.ts:63 - Used in example workflow creation
  • Test files and documentation contain reference examples
  • Generated YAML workflows use the pinned commit hash
• Impact on other dependencies: None - this is an isolated action dependency update
• Configuration impact: Only affects the version pinning in actions.json and actions-lock.json
• API compatibility: No changes to action inputs/outputs or usage patterns

💡 Recommended Actions

• Required modification work: None - the update only affects version metadata files
• Merge safety: Safe to merge immediately - no code changes required in the codebase
• Testing: The existing CI workflows will automatically use the new version and validate functionality
• Monitoring: Standard monitoring after merge to ensure workflows continue functioning normally

🔗 Reference Links

• Release notes v4.3.1
• Pull Request #2305
• Version comparison

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