Fixed missed migration; no tables were available, though.

I18N Commander/DataModel/Setup.cs

@@ -54,6 +54,9 @@ public static class Setup
         await using var serviceProvider = serviceCollection.BuildServiceProvider();
         var dbContext = serviceProvider.GetRequiredService<DataContext>();
         
+        // Migrate the database to create the tables etc.:
+        await Setup.PerformDataMigration(dbContext);
+        
         // Next, we import the data from the provided JSON file:
         await dbContext.ImportAsync(path2JSONFile);