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

[renovate]

This PR contains the following updates:

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

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Release Notes

actions/cache (actions/cache)

v5

Compare Source

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Configuration

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[claude]

Code Review: chore(deps): update actions/cache action to v5

Summary

This PR updates the GitHub Actions cache action from v4 to v5 in the Docker workflow.

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✅ Strengths

1. Automated Dependency Management: Using Renovate bot for dependency updates is a best practice.

2. Minimal Change: Single-line change reduces risk of issues.

3. CI Integration: The change is in CI/CD infrastructure, not production code.

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🔍 Review Findings

1. Release Notes: The PR links to the v4→v5 comparison but does not detail what changed. Key changes in actions/cache v5 typically include:

   • Updated to Node.js 20 runtime (from Node.js 16)
   • Potential performance improvements
   • Bug fixes and security updates

2. Breaking Changes: Need to verify if there are any breaking changes in v5 that could affect the Docker build caching behavior.

3. Testing: The change should be validated by running the Docker workflow to ensure:

   • Cache keys still work correctly
   • Build performance is maintained or improved
   • No errors occur during cache save/restore operations

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🔒 Security Considerations

• ✅ Updating GitHub Actions is generally good for security
• ✅ actions/cache is a trusted first-party GitHub Action
• ✅ Using major version tags (v5) provides stability while getting security updates

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⚡ Performance Considerations

• ✅ actions/cache v5 uses Node.js 20, which may provide better performance
• ✅ Cache behavior should remain consistent
• ⚠️ Verify that cache hit rates do not degrade after the update

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📋 Recommendations

1. Before Merging:

   • ✅ Check that the Docker workflow runs successfully with v5
   • ✅ Verify cache hit/miss behavior is consistent
   • ✅ Review the official v5 release notes for any breaking changes

2. After Merging:

   • Monitor the first few Docker builds to ensure caching works as expected

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✅ Overall Assessment

This is a low-risk, routine dependency update that should be safe to merge after CI passes.

Recommendation: ✅ Approve after CI passes

• No code changes required
• Standard dependency update
• actions/cache is well-maintained and stable

Risk Level: Low
Impact: Minimal (CI infrastructure only)
Approval: ✅ LGTM pending successful CI run

[renovate]

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