update task

TASK.md

@@ -155,9 +155,9 @@ Expected behavior:
 
 ## Step 8: DLQ Drill (10 min)
 
-- [ ] In worker, temporarily `basic_nack(requeue=False)` for one special order.
-- [ ] Verify message appears in `orders.dlq`.
-- [ ] Inspect message payload from RabbitMQ UI.
+- [x] In worker, temporarily `basic_nack(requeue=False)` for one special order.
+- [x] Verify message appears in `orders.dlq`.
+- [x] Inspect message payload from RabbitMQ UI.
 
 ## What You Learn (Concrete)
 
@@ -166,9 +166,3 @@ Expected behavior:
 - [ ] Manual ACK and redelivery
 - [ ] Retry strategy and failure handling
 - [ ] DLQ basics used in real systems
-
-## Optional Next Lab
-
-- [ ] Add HTTP API (`FastAPI`) that accepts `/orders` and publishes to RabbitMQ.
-- [ ] Add publisher confirms.
-- [ ] Replace classic queue with quorum queue and compare behavior.