feat: synthesize Daily GIEN DevSecOps Dossier v2.4 and fix validation CI
- Created `docs/reports/DAILY_GIEN_DEVSECOPS_DOSSIER_V2.4.md` for G-SIFI operational verification.
- Refactored `tools/validate_ai_governance_artifacts.py` to use `Dict[str, Any]` for dynamic validation summaries, satisfying mypy.
- Wrapped long lines in `tools/validate_ai_governance_artifacts.py` to meet 120-char limit.
- Refactored `tests/test_governance_validator.py` to eliminate JSCPD duplication and satisfy isort import ordering requirements.
- Updated evidence hash test data to use valid 64-character hex strings.
Co-authored-by: OneFineStarstuff <87420139+OneFineStarstuff@users.noreply.github.com>