github: skip Copilot reviews for draft PRs

[andrijapanicsb]

Summary

Disable automatic GitHub Copilot code reviews for draft pull requests while keeping automatic review enabled once a PR is ready for review and on subsequent pushes.

Rationale

A draft PR explicitly represents work that is not yet ready for review. Contributors may use drafts as an incremental remote workspace and push many incomplete commits while developing or testing a change. Running Copilot review on the initial draft and on every push during that phase creates review noise and consumes AI/Actions resources before the author has requested review.

This keeps the useful automatic review behaviour for PRs that are ready for review, including re-review after later pushes.

Change

copilot_code_review:
  enabled: true
  review_drafts: false
  review_on_push: true

Testing

Configuration-only change. Verified the resulting YAML diff changes only review_drafts from true to false.

[andrijapanicsb]

@vishesh92 pls verify this. Your tokens are affected :)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 19.73%. Comparing base (6764ca5) to head (c0ff702).

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #13996      +/-   ##
============================================
- Coverage     19.73%   19.73%   -0.01%     
+ Complexity    19959    19956       -3     
============================================
  Files          6371     6371              
  Lines        575784   575784              
  Branches      70478    70478              
============================================
- Hits         113653   113644       -9     
- Misses       449778   449788      +10     
+ Partials      12353    12352       -1     

Flag	Coverage Δ
uitests	3.41% <ø> (ø)
unittests	21.01% <ø> (-0.01%)	⬇️

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