Fix up item usage

Zennysoft.Game.Ma/src/item_rescue/RescuedItemDatabase.cs

@@ -1,6 +1,7 @@
 using Chickensoft.Introspection;
 using Chickensoft.Serialization;
 using System.Collections.Generic;
+using Zennysoft.Game.Abstractions;
 
 namespace Zennysoft.Game.Ma;
 
@@ -8,10 +9,10 @@ namespace Zennysoft.Game.Ma;
 public partial class RescuedItemDatabase
 {
   [Save("rescued_item_list")]
-  public List<InventoryItem> Items { get; init; }
+  public List<IInventoryItem> Items { get; init; }
 
   public RescuedItemDatabase()
   {
-    Items = new List<InventoryItem>();
+    Items = new List<IInventoryItem>();
   }
 }