- Remove syncPendingOrders and its helpers (handleSucceeded, handleCancelled, handleFailed) from StripeSyncCommand
- Clean up unused dependencies (BilletOrderService, MailerService, AuditService, BilletBuyer)
- Add PESSIMISTIC_WRITE lock in handlePaymentIntentSucceeded to prevent duplicate ticket generation when Stripe sends concurrent webhook calls
- Update tests to match simplified command
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>