WinRacing Audit Fix Knife 1 — Safety Foundation V50.1

ADDED
- Chairman/safety/ChairmanRuntimeLoggerV501.php
- Chairman/safety/ChairmanSchemaCompatibilityGuardV501.php
- Chairman/api/api_runtime_health_v50_1.php
- wr_chairman_safety_foundation_v50_1.php
- analysis_chairman_v4_1_integrated_safety_v50_1.php
- analysis_chairman_v50_ultimate_safety_v50_1.php
- wr_chairman_ultimate_decision_engine_v50_1_safety.php

SAFETY
- No scoring formula changed
- No DB ALTER executed
- No old file removed
- Legacy duplicate endpoint retained as opt-in fallback
- Errors are logged to winRacing/logs/chairman/
