change reallocate handler to avoid cmd/event clash

Author: hjwp

src/allocation/service_layer/handlers.py

@@ -43,10 +43,7 @@ def reallocate(
     event: events.Deallocated,
     uow: unit_of_work.AbstractUnitOfWork,
 ):
-    with uow:
-        product = uow.products.get(sku=event.sku)
-        product.events.append(commands.Allocate(**asdict(event)))
-        uow.commit()
+    allocate(commands.Allocate(**asdict(event)), uow=uow)
 
 
 def change_batch_quantity(