Updating project to correct the following errors:

1. Using directive should appear within a namespace declaration
2. Use trailing comma in multi-line initializers

src/Jellyfin.Database/Jellyfin.Database.Implementations/Entities/UserData.cs

@@ -2,10 +2,10 @@
 // Copyright (c) PlaceholderCompany. All rights reserved.
 // </copyright>
 
-using System;
-
 namespace Jellyfin.Database.Implementations.Entities;
 
+using System;
+
 /// <summary>
 /// Provides <see cref="BaseItemEntity"/> and <see cref="User"/> related data.
 /// </summary>