Basic Architecture of Sport Web

apps/api/src/modules/checkout/checkout.module.ts

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+import { Module } from '@nestjs/common';
+
+/**
+ * CheckoutModule — boundary declared, implementation pending.
+ *
+ * Owns (exclusively): Checkout sessions (Redis, short TTL)
+ *
+ * Orchestrates the cart → stock reservation → payment intent → order transition. The only module allowed to coordinate across contexts, and it does so through public services and events.
+ *
+ * Anatomy once implemented (see ../README.md):
+ *   checkout.module.ts        wiring only
+ *   checkout.controller.ts    HTTP surface, no logic
+ *   checkout.service.ts       business rules
+ *   checkout.repository.ts    the only file that touches Prisma
+ *   dto/                           request/response shapes
+ *   public/                        what other modules may import
+ */
+@Module({})
+export class CheckoutModule {}