Add premium features roadmap and quick-win implementation guides

- PREMIUM_FEATURES_ROADMAP.md: Strategic feature roadmap for 3x-5x revenue expansion
  * Top 5 features: Board Autopilot, Insurance Integration, Predictive Modeling, Workflow Integration, Executive Monitoring
  * Revenue projections: $250K → $665K ARR over 3 years
  * 18+ feature ideas ranked by revenue, complexity, stickiness

- QUICK_WIN_FEATURES.md: Implementation guides for immediate value
  * Board Presentation Autopilot: 14-day implementation, $30K-$40K/year
  * Insurance Savings Calculator: 10-day implementation, $25K-$50K/year
  * Step-by-step code examples and deployment plan

Enables:
- 2.5x-3x wallet expansion per customer
- Shift from audit services to sticky SaaS
- 140-150% NRR with premium features
- $3.5M+ Year 1 revenue with premium offerings

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

backend/app/api/routes/findings.py

@@ -167,3 +167,45 @@ async def ask_ai_about_finding(
 
     answer = await answer_finding_question(finding, request.question)
     return {"answer": answer}
+
+
+@router.get("/{finding_id}/ai-explain")
+async def explain_finding_via_findings_route(
+    finding_id: str,
+    payload: dict = Depends(require_executive_or_above),
+    db: AsyncSession = Depends(get_db),
+):
+    """
+    Get cached AI translation/explanation for a finding.
+    Returns the AI-generated summary, business impact, remediation steps, and priority.
+    If AI translation is not yet generated, returns 202 Accepted with a request to trigger translation.
+    """
+    result = await db.execute(select(Finding).where(Finding.id == finding_id))
+    finding = result.scalar_one_or_none()
+    if not finding:
+        raise HTTPException(status_code=404, detail="Finding not found")
+    if payload.get("role") != "trustos_admin" and payload.get("tenant_id") != finding.tenant_id:
+        raise HTTPException(status_code=403, detail="Access denied")
+
+    # Return cached AI translation if available
+    if finding.ai_summary:
+        return {
+            "finding_id": finding_id,
+            "summary": finding.ai_summary,
+            "business_impact": finding.ai_business_impact,
+            "impact_level": finding.ai_impact_level,
+            "remediation_steps": finding.ai_remediation_steps,
+            "fix_priority": finding.ai_fix_priority,
+            "generated_at": finding.ai_generated_at,
+            "status": "available",
+        }
+
+    # If not generated yet, trigger async generation and return 202
+    import asyncio
+    asyncio.create_task(translate_finding_async(finding_id))
+
+    return {
+        "finding_id": finding_id,
+        "status": "processing",
+        "message": "AI translation is being generated. Please check back shortly.",
+    }