fix(github): use provided target ref in GetFileInsideRepo

[theakshaypant]

📝 Description of the Change

GetFileInsideRepo ignored the caller-supplied target ref and substituted runevent.BaseBranch. This caused OWNERS ACL checks to read from the wrong branch when a PR targets a non-default branch, and remote task fetches to resolve against the PR base instead of the specified ref.

🔗 Linked GitHub Issue

N/A

🧪 Testing Strategy

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• Integration tests
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• Manual testing
• Not Applicable

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[gemini-code-assist]

Code Review

This pull request updates the GetFileInsideRepo function in the GitHub provider to correctly use the provided target parameter as the reference when it is not empty, instead of defaulting to the base branch. I have no feedback to provide.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.02%. Comparing base (5c09648) to head (fcb2f52).
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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2696      +/-   ##
==========================================
+ Coverage   59.01%   59.02%   +0.01%     
==========================================
  Files         208      208              
  Lines       20452    20452              
==========================================
+ Hits        12069    12072       +3     
+ Misses       7609     7607       -2     
+ Partials      774      773       -1     

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[theakshaypant]

Should be cherry-picked to release-v0.42.x as well.

[zakisk]

Should be cherry-picked to release-v0.42.x as well.

why? is it asked by anyone?

[zakisk]

also can you please add unit tests?

[theakshaypant]

also can you please add unit tests?

Added unit tests for the changes in 20a9738

Should be cherry-picked to release-v0.42.x as well.

why? is it asked by anyone?

We can discuss this offline.