HH-564: harden durable realtime publish boundaries (#139)

* fix(HH-564): harden durable realtime enqueue

* fix(HH-564): wire production SSE stream

---------

Co-authored-by: Rogee <rogee@ipao.vip>

backend/internal/handler/ws/ws_test.go

@@ -339,6 +339,8 @@ func TestDurableWidgetRetryDoesNotDuplicateRealHubSubscribers(t *testing.T) {
 	visitor.PubsubToken = "visitor"
 	visitor.Identifier = `{"channel":"RoomChannel","pubsub_token":"visitor"}`
 	hub.Register(visitor)
+	sse := wspkg.NewSSERegistry()
+	dashboardSSE := sse.Subscribe("dashboard", 1, 1)
 
 	relay := wspkg.NewBroadcastRelay(rdb, hub)
 	ctx, cancel := context.WithCancel(context.Background())
@@ -348,7 +350,7 @@ func TestDurableWidgetRetryDoesNotDuplicateRealHubSubscribers(t *testing.T) {
 		require.NoError(t, relay.Stop())
 	})
 	pool := worker.NewWorkerPoolWithOptions(db, worker.WithBackoff(func(int) time.Duration { return 0 }))
-	publisher := wspkg.NewEventPublisher(hub, nil, relay)
+	publisher := wspkg.NewEventPublisher(hub, sse, relay)
 	publisher.SetWorkerPool(pool)
 	require.NoError(t, publisher.PublishWidgetEvent(1, "visitor", wspkg.EventMessageCreated, map[string]any{"id": 7}))
 
@@ -360,6 +362,12 @@ func TestDurableWidgetRetryDoesNotDuplicateRealHubSubscribers(t *testing.T) {
 	case <-time.After(time.Second):
 		t.Fatal("account subscriber did not receive message.created")
 	}
+	select {
+	case event := <-dashboardSSE.Events:
+		require.Equal(t, wspkg.EventMessageCreated, event.Type)
+	case <-time.After(time.Second):
+		t.Fatal("SSE subscriber did not receive message.created")
+	}
 
 	processed, err = pool.ProcessOne(context.Background())
 	require.True(t, processed)
@@ -385,6 +393,11 @@ func TestDurableWidgetRetryDoesNotDuplicateRealHubSubscribers(t *testing.T) {
 	default:
 	}
 	select {
+	case <-dashboardSSE.Events:
+		t.Fatal("SSE subscriber received duplicate message.created")
+	default:
+	}
+	select {
 	case <-visitor.Send:
 		t.Fatal("token subscriber received duplicate message.created")
 	default: