feat: wire 10-step FO Blog Pipeline into blog generation route
Replaces old 2-pass pipeline with full Flexoptix Style 10-step generation:
1. Topic Expansion (real scenarios + wrong assumptions)
2. Angle Selection (single strong angle + audience)
3. Outline Generation (decision-driven, no generic sections)
4. Master Draft (Flexoptix voice, 2000+ words)
5. Reality Injection (failure scenarios, operational pain)
6. Technical Deepening (specific optics, power, density)
7. Opinion Layer (clear positions, no neutrality)
8. Kill AI Tone (remove all AI fingerprints)
9. QA Check (technical accuracy verification)
10. Quality Score (1-10 auto-rating, saved as self-feedback)
Feedback loop active:
- Accumulated feedback injected into system prompt
- Auto QA scores saved to blog_feedback table
- Training data export via GET /api/blog/feedback/training-data
98a7e12282