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/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.Modbus.Cli.Tests/CommandCancellationTests.cs

@@ -18,6 +18,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Modbus.Cli.Tests;
 [Trait("Category", "Unit")]
 public sealed class CommandCancellationTests
 {
+    /// <summary>Verifies that probe command gracefully handles cancellation during initialization.</summary>
     [Fact]
     public async Task ProbeCommand_swallows_cancellation_during_initialize()
     {
@@ -29,6 +30,7 @@ public sealed class CommandCancellationTests
         await Should.NotThrowAsync(async () => await sut.ExecuteAsync(console));
     }
 
+    /// <summary>Verifies that read command gracefully handles cancellation during initialization.</summary>
     [Fact]
     public async Task ReadCommand_swallows_cancellation_during_initialize()
     {
@@ -46,6 +48,7 @@ public sealed class CommandCancellationTests
         await Should.NotThrowAsync(async () => await sut.ExecuteAsync(console));
     }
 
+    /// <summary>Verifies that write command gracefully handles cancellation during initialization.</summary>
     [Fact]
     public async Task WriteCommand_swallows_cancellation_during_initialize()
     {