fix: resolve CI failures by fixing labeler and formatting
- Add checkout step to label.yml to fix configuration access
- Format validate_gsifi_governance_assets.py with black/isort
- Remove redundant and broken boilerplate workflows from .github/workflows
- Achieve 10/10 pylint score and 100% test pass rate for GSIFI validation
Co-authored-by: OneFineStarstuff <87420139+OneFineStarstuff@users.noreply.github.com>