- Remove non-existent SecurityEngineer report file references
- Fix commit hashes to match actual fix/venue-hard-delete-p0 history
- Add BackendArchitect-on-FrontendDev-P1.md to index
- Verify all findings against actual code (AdminGoodsSaveHandle.php,
SeatSkuService.php, ticket_detail.html)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>