WinRacing V65.0 — Final Race-Day Production Release

Added:
- analysis_chairman_v65_final_release.php
- Chairman/api/api_final_release_v65.php
- Chairman/audit/wr_chairman_final_release_certifier_v65_0.php

Purpose:
- Final production certification over the complete V61-V64 safety chain.
- Issues a deterministic release token only when every critical check passes.
- Locks the source fingerprint across V63 shadow, V64 rehearsal and V65 release.
- Provides the final race-day monitored-use and rollback runbook.

Safety:
- Pre-race only.
- No database writes.
- No schema changes.
- No live-weight changes.
- No source-decision mutation.
- Results remain isolated.
- Fail-closed on any critical certification failure.
