عرض عملي: ساغا الطلب، المسار الناجح

خطوة بخطوة

1. Show the saga table and the OrderSaga state machine inside orders.
2. POST /orders creates the order PENDING and a saga row, and writes a ReserveStock command via the outbox.
3. inventory replies StockReserved; the orchestrator moves to STOCK_RESERVED and sends AuthorizePayment.
4. Planned mistake: handle StockReserved without checking the current state; replay the reply and the saga re-sends the payment command. Fix: ignore replies unless the state matches, plus inbox dedup.
5. payments replies PaymentAuthorized; order becomes CONFIRMED, saga COMPLETED.
6. Show the trace by correlation id across the three services.