Adding BasketId to model to ensure cascading deletes will clean up BasketItems

src/ApplicationCore/Entities/BasketAggregate/BasketItem.cs

@@ -5,5 +5,6 @@
         public decimal UnitPrice { get; set; }
         public int Quantity { get; set; }
         public int CatalogItemId { get; set; }
+        public int BasketId { get; private set; }
     }
 }