fix: resolve CI failures for labeler, linting, and pylint
- Add checkout step to label.yml and upgrade to actions/labeler@v5
- Format validation script with black and isort to satisfy super-linter
- Add .pylintrc to ignore duplication in auto-generated dashboard files
- Ensure validate_gsifi_governance_assets.py has 10/10 pylint score
- Verify all 23 GSIFI validation tests pass locally
Co-authored-by: OneFineStarstuff <87420139+OneFineStarstuff@users.noreply.github.com>