docs: backfill XML documentation across 756 files

Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.

src/Client/ZB.MOM.WW.OtOpcUa.Client.UI/ViewModels/HistoryValueViewModel.cs

@@ -7,6 +7,11 @@ namespace ZB.MOM.WW.OtOpcUa.Client.UI.ViewModels;
 /// </summary>
 public class HistoryValueViewModel : ObservableObject
 {
+    /// <summary>Initializes a new instance of the <see cref="HistoryValueViewModel"/> class.</summary>
+    /// <param name="value">The historical value.</param>
+    /// <param name="status">The status code or text.</param>
+    /// <param name="sourceTimestamp">The source timestamp in string format.</param>
+    /// <param name="serverTimestamp">The server timestamp in string format.</param>
     public HistoryValueViewModel(string value, string status, string sourceTimestamp, string serverTimestamp)
     {
         Value = value;
@@ -15,8 +20,12 @@ public class HistoryValueViewModel : ObservableObject
         ServerTimestamp = serverTimestamp;
     }
 
+    /// <summary>Gets the historical value.</summary>
     public string Value { get; }
+    /// <summary>Gets the status code or text.</summary>
     public string Status { get; }
+    /// <summary>Gets the source timestamp in string format.</summary>
     public string SourceTimestamp { get; }
+    /// <summary>Gets the server timestamp in string format.</summary>
     public string ServerTimestamp { get; }
 }