Core/DataStores: Updated db2 structures to 9.1.5

Port From (https://github.com/TrinityCore/TrinityCore/commit/d52c00a8fe79186013980af0e2caa3fd13c0c5fa)

Source/Game/Entities/Item/Item.cs

@@ -1991,7 +1991,7 @@ namespace Game.Entities
 
             ItemModifiedAppearanceRecord transmog = CliDB.ItemModifiedAppearanceStorage.LookupByKey(itemModifiedAppearanceId);
             if (transmog != null)
-                return transmog.ItemAppearanceModifierID;
+                return (ushort)transmog.ItemAppearanceModifierID;
 
             return (ushort)GetAppearanceModId();
         }

Source/Game/Entities/Player/CollectionManager.cs

@@ -784,7 +784,7 @@ namespace Game.Entities
         {
             List<uint> appearances = new();
             foreach (int id in _appearances)
-                appearances.Add(CliDB.ItemModifiedAppearanceStorage.LookupByKey(id).ItemAppearanceID);
+                appearances.Add((uint)CliDB.ItemModifiedAppearanceStorage.LookupByKey(id).ItemAppearanceID);
 
             return appearances;
         }