add handler for allocated

Author: hjwp

src/allocation/service_layer/messagebus.py

@@ -60,7 +60,10 @@ def handle_command(
 
 
 EVENT_HANDLERS = {
-    events.Allocated: [handlers.publish_allocated_event],
+    events.Allocated: [
+        handlers.publish_allocated_event,
+        handlers.add_allocation_to_read_model
+    ],
     events.OutOfStock: [handlers.send_out_of_stock_notification],
 }  # type: Dict[Type[events.Event], List[Callable]]