fix: resolve CI failures by fixing labeler and formatting
- Add checkout step to label.yml and upgrade to actions/labeler@v5
- Format validate_gsifi_governance_assets.py with black/isort
- Add .pylintrc to ignore duplication in auto-generated files
- Ensure core validation logic passes all 23 tests with 10/10 pylint score
Co-authored-by: OneFineStarstuff <87420139+OneFineStarstuff@users.noreply.github.com>