feat: synthesize Daily GIEN DevSecOps Dossier v2.4 & harden high-assurance toolchain
- Synthesized the definitive "Daily GIEN DevSecOps Operational Verification & Supervisory Digital Twin Guidance Dossier" (V2.4).
- Integrated G-SRI telemetry, PQC-WORM audit batch integrity, and TEE attestation status.
- Mapped system posture to 15+ global regulatory frameworks (EU AI Act Annex IV, NIST, Basel IV, DORA).
- Updated `docs/reports/governance_reports_manifest.json` and bumped version to 2026.2.
- Hardened `tools/validate_ai_governance_artifacts.py` against mypy literal-required and E501 rules.
- Refactored `tests/test_governance_validator.py` to eliminate JSCPD duplication and satisfy isort.
- Ensured 100% pass rate across 29 governance tests and 15 daily G-SIFI checks.
Co-authored-by: OneFineStarstuff <87420139+OneFineStarstuff@users.noreply.github.com>