docs: add XML documentation to NEW solution src files

Fix 173 of 175 documentation issues across 48 files using CommentChecker,
adding missing <summary>, <param>, and <inheritdoc /> tags to public APIs.

NEW/src/Utils/JdeScoping.ConfigManager/ViewModels/Forms/DataSyncFormViewModel.cs

@@ -10,6 +10,11 @@ public class DataSyncFormViewModel : ViewModelBase
     private readonly DataSyncSection _model;
     private readonly Action _onChanged;
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="DataSyncFormViewModel"/> class.
+    /// </summary>
+    /// <param name="model">The data sync section model to edit.</param>
+    /// <param name="onChanged">The callback to invoke when configuration changes.</param>
     public DataSyncFormViewModel(DataSyncSection model, Action onChanged)
     {
         _model = model ?? throw new ArgumentNullException(nameof(model));