## Summary
- Add `conventional-commit` CI job that validates PR titles and push
commit messages follow the `type(scope)?: description` format
- Valid types: `feat`, `fix`, `refactor`, `chore`, `build`, `ci`,
`docs`, `test`, `perf`, `style`, `revert`
- Runs on both PR and push events, skips tag pushes
- Zero dependencies, pure bash regex check
## Test plan
- [x] PR title of this PR itself passes the check
- [ ] CI runs and passes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Chores**
* Enhanced continuous integration pipeline to validate commit message
formatting standards on all pull requests and commits.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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