fix: Skip CODEOWNERS validation when file not modified

[osterman]

what

• Added tj-actions/changed-files step to detect if .github/CODEOWNERS was modified in the PR
• Only run CODEOWNERS validation checks when the file actually changed or on manual workflow_dispatch triggers
• Prevents unnecessary validation overhead for PRs that don't touch the CODEOWNERS file

why

• The CODEOWNERS validation should only run when the file is actually modified
• This reduces CI overhead and prevents friction for unrelated PRs
• Always allow manual validation via workflow_dispatch for verification purposes

references

• Uses tj-actions/changed-files@v45 - a widely-used, well-maintained action for detecting changed files

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch osterman/codeowners-check-skip

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[mergify]

Important

Cloud Posse Engineering Team Review Required

This pull request modifies files that require Cloud Posse's review. Please be patient, and a core maintainer will review your changes.

To expedite this process, reach out to us on Slack in the #pr-reviews channel.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues found.

Scanned Files

• .github/workflows/validate-codeowners.yml

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.35%. Comparing base (34d6675) to head (ca12c84).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2016      +/-   ##
==========================================
- Coverage   75.36%   75.35%   -0.01%     
==========================================
  Files         792      792              
  Lines       73396    73396              
==========================================
- Hits        55315    55310       -5     
- Misses      14570    14578       +8     
+ Partials     3511     3508       -3     

Flag	Coverage Δ
unittests	75.35% <ø> (-0.01%)	⬇️

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see 3 files with indirect coverage changes

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[github-actions]

These changes were released in v1.204.1-rc.5.