Test: Auto-merge and stable release

[kompre]

Test Objectives

This PR tests the complete automated release workflow:

1. ✅ Version Bump: bump:stable label should remove rc suffix

   • Current: 2025.9.0rc10 → Expected: 2025.9.0

2. ✅ Auto-merge: Version bump workflow should enable auto-merge

   • PR should auto-merge once all checks pass

3. ✅ Branch Protection: Required test check must pass before merge

4. ✅ Release Workflow: After merge, should trigger and publish to TestPyPI

   • Build package
   • Run tests
   • Publish to TestPyPI (will fail until environment configured)
   • Create git tag v2025.9.0
   • Create GitHub Release

Expected Flow

1. Version bump workflow runs → commits new version → enables auto-merge
2. Test workflow completes
3. PR auto-merges
4. Release workflow triggers on push to main
5. Package published to TestPyPI

🤖 Generated with Claude Code

[github-actions]

✅ Version bumped: 2025.9.0rc10 → 2025.9.0

[github-actions]

✅ Version bumped: 2025.9.0rc10 → 2025.9.0