- Added LiteLLM fallback chains for explicit GPU models
- Changed allowed_fails: 0 -> 100 (router returns 503 on saturated)
- Documented strict passthrough router change (already deployed)
- Rewrote Appendix A as actual Model Identity Gap Analysis
- Added risk mitigation for fallback chain masking real failures
- Updated success metrics to reflect accurate per-model tracking
- Reviewed and approved by Mumuni and Kagenz0