chore: Push artifacts using PRs on the protected branch

[zguesmi]

No description provided.

[Copilot]

Pull Request Overview

Updates the deployment workflow to handle artifact commits differently based on branch protection, creating pull requests for protected branches instead of direct commits.

• Adds environment variables for standardized commit metadata (bot name, email, commit message)
• Splits artifact saving into two conditional steps: direct commits for non-main branches and PR creation for the main branch
• Updates permissions to include pull-requests write access for PR creation functionality

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.82%. Comparing base (f7c634b) to head (6c373be).
⚠️ Report is 25 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #285      +/-   ##
==========================================
+ Coverage   83.66%   84.82%   +1.16%     
==========================================
  Files          38       37       -1     
  Lines        1218     1239      +21     
  Branches      227      235       +8     
==========================================
+ Hits         1019     1051      +32     
+ Misses        199      188      -11     

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