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/Helpers/StatusCodeFormatter.cs

@@ -7,6 +7,9 @@ namespace ZB.MOM.WW.OtOpcUa.Client.UI.Helpers;
 /// </summary>
 internal static class StatusCodeFormatter
 {
+    /// <summary>Formats an OPC UA status code as a hexadecimal code with description.</summary>
+    /// <param name="statusCode">The OPC UA status code to format.</param>
+    /// <returns>A formatted string in the form "0xHEX (description)".</returns>
     public static string Format(StatusCode statusCode)
     {
         var code = statusCode.Code;

src/Client/ZB.MOM.WW.OtOpcUa.Client.UI/Helpers/ValueFormatter.cs

@@ -7,6 +7,9 @@ namespace ZB.MOM.WW.OtOpcUa.Client.UI.Helpers;
 /// </summary>
 internal static class ValueFormatter
 {
+    /// <summary>Formats an OPC UA value for display, handling arrays and enumerables specially.</summary>
+    /// <param name="value">The value to format, or null.</param>
+    /// <returns>A string representation of the value suitable for display.</returns>
     public static string Format(object? value)
     {
         if (value is null) return "(null)";