feat(ai-governance): AI Governance Policy Report Part I — Sections 1-2

Technical policy report: 'Navigating the Governance of Advanced AI Systems'
targeting senior government officials, AI researchers, and industry leaders.

New HTML page: ai-governance-report.html (~1,800 words, Part I)
- Section 1: Executive Summary
  - Scope: frontier models, GPAI, AGI-adjacent systems across 5 jurisdictions
  - 7 key findings (definitional divergence, compute governance, liability gaps)
  - 4 priority recommendations (IASEC, compute thresholds, red-teaming, AGI contingency)
- Section 2: Introduction — Frontier Models & AGI-Adjacent Systems
  - Current capability landscape (GPT-4, Gemini, Claude 3, Llama 3)
  - AGI-adjacent definitional challenges (4-criterion operational definition)
  - Governance imperative: 4-category risk taxonomy (dual-use, systemic, safety, sovereignty)
  - Governance Stack model (4 layers: statutory, technical standards, self-governance, international)

New API endpoints (4):
  /api/ai-governance — Full report metadata + all data
  /api/ai-governance/findings — Key findings + priority recommendations
  /api/ai-governance/risks — 4-category risk taxonomy with evidence + gap assessments
  /api/ai-governance/frameworks — Governance stack + frontier model timeline + jurisdictions

Verification: 28 API endpoints all HTTP 200, 9 HTML pages zero console errors.

Author: OneFineStarstuff