fix: harden upstream and downstream receipt delivery

gateway/internal/upstream/deliver_test.go

@@ -15,7 +15,7 @@ import (
 func TestHandleCMPP2DeliverReceiptPostsReceiptEvent(t *testing.T) {
 	events := make(chan queue.ReceiptEvent, 1)
 	api := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if r.URL.Path != "/gateway/events/receipt" {
+		if r.URL.Path != "/gateway/events/receipt/intake" {
 			t.Fatalf("unexpected path: %s", r.URL.Path)
 		}
 		var event queue.ReceiptEvent
@@ -58,12 +58,14 @@ func TestHandleCMPP2DeliverReceiptPostsReceiptEvent(t *testing.T) {
 			},
 		},
 	}
-	conn.handleDeliver(deliverPacketFromCMPP2(&cmpp.Cmpp2DeliverReqPkt{
+	if err := conn.handleDeliver(deliverPacketFromCMPP2(&cmpp.Cmpp2DeliverReqPkt{
 		SeqId:            7,
 		MsgId:            999,
 		RegisterDelivery: 1,
 		MsgContent:       string(payload),
-	}))
+	})); err != nil {
+		t.Fatalf("handle receipt: %v", err)
+	}
 
 	select {
 	case event := <-events:
@@ -82,6 +84,9 @@ func TestHandleCMPP2DeliverReceiptPostsReceiptEvent(t *testing.T) {
 		if event.ReceiptStatus != "delivered" || event.RawStatus != "DELIVRD" {
 			t.Fatalf("unexpected receipt status: %+v", event)
 		}
+		if event.ConnectionID != "channel-1-0" {
+			t.Fatalf("ConnectionID = %q, want channel-1-0", event.ConnectionID)
+		}
 	case <-time.After(time.Second):
 		t.Fatal("timed out waiting for receipt event")
 	}