V52.3 Validation Checklist
- FP/FN root-cause analyzer present: PASS
- Per-race severity and correction suggestion present: PASS
- Aggregated error_analysis API section present: PASS
- Dashboard error analyzer panel present: PASS
- ADVISORY_ONLY retained: PASS
- live_weights_changed=false retained: PASS
- V44-V51 logic untouched: PASS
- ALTER/CREATE/DROP in V52 files: NONE
- Placeholder/echo Ready in V52 files: NONE
