docs: add quiz quality dashboard
**Dashboard Overview:**
- Executive summary (93.8% pass rate, +3.6% improvement)
- Category performance (4 tiers: S/A/B/C/D)
- Issue breakdown by type (0 critical, 13 warnings, 3 info)
- Improvement roadmap (3 phases)
- Root cause analysis (40% guide context extraction issues)
- Historical trends & velocity tracking
- Best practices learned
**Key Insights:**
- Perfect categories: Q05, Q07, Q11, Q13 (100%)
- At-risk categories: Q09 (79.3%), Q10 (75.0%)
- Main issue: Guide context extraction (8/16 issues)
- Velocity: +3.6% in 1 day (9 fixes)
**Next Milestone:** 95%+ pass rate (12 fixes needed)
File: claudedocs/quiz-quality-dashboard.md (tracking quality over time)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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