добавил

ComputerHardwareStore/ComputerHardwareStoreDataModels/IId.cs

@@ -2,6 +2,6 @@
 {
     public interface IId
     {
-        int Id { get; init; }
+        int Id { get; }
     }
 }

ComputerHardwareStore/ComputerHardwareStoreDataModels/Models/IOrderModel.cs

@@ -4,6 +4,7 @@
     {
         double Cost { get; }
         DateTime DateCreate { get; }
+        int StoreKeeperId { get; }
         public Dictionary<int, (IProductModel, int)> OrderProduct { get; }
     }
 }