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.

tests/Client/ZB.MOM.WW.OtOpcUa.Client.CLI.Tests/TestConsoleHelper.cs

@@ -18,6 +18,8 @@ public static class TestConsoleHelper
     /// <summary>
     ///     Reads all text written to the console's standard output.
     /// </summary>
+    /// <param name="console">The fake console instance.</param>
+    /// <returns>The console output text.</returns>
     public static string GetOutput(FakeInMemoryConsole console)
     {
         console.Output.Flush();
@@ -27,6 +29,8 @@ public static class TestConsoleHelper
     /// <summary>
     ///     Reads all text written to the console's standard error.
     /// </summary>
+    /// <param name="console">The fake console instance.</param>
+    /// <returns>The console error text.</returns>
     public static string GetError(FakeInMemoryConsole console)
     {
         console.Error.Flush();