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/AlarmsCommandTests.cs

@@ -7,6 +7,7 @@ namespace ZB.MOM.WW.OtOpcUa.Client.CLI.Tests;
 
 public class AlarmsCommandTests
 {
+    /// <summary>Verifies that Execute subscribes to alarms.</summary>
     [Fact]
     public async Task Execute_SubscribesToAlarms()
     {
@@ -31,6 +32,7 @@ public class AlarmsCommandTests
         fakeService.SubscribeAlarmsCalls[0].SourceNodeId.ShouldBeNull();
     }
 
+    /// <summary>Verifies that Execute with node passes source node ID.</summary>
     [Fact]
     public async Task Execute_WithNode_PassesSourceNodeId()
     {
@@ -55,6 +57,7 @@ public class AlarmsCommandTests
         fakeService.SubscribeAlarmsCalls[0].SourceNodeId!.Identifier.ShouldBe("AlarmSource");
     }
 
+    /// <summary>Verifies that Execute with refresh requests condition refresh.</summary>
     [Fact]
     public async Task Execute_WithRefresh_RequestsConditionRefresh()
     {
@@ -79,6 +82,7 @@ public class AlarmsCommandTests
         output.ShouldContain("Condition refresh requested.");
     }
 
+    /// <summary>Verifies that refresh failure prints error.</summary>
     [Fact]
     public async Task Execute_RefreshFailure_PrintsError()
     {
@@ -105,6 +109,7 @@ public class AlarmsCommandTests
         output.ShouldContain("Condition refresh not supported:");
     }
 
+    /// <summary>Verifies that Execute unsubscribes on cancellation.</summary>
     [Fact]
     public async Task Execute_UnsubscribesOnCancellation()
     {
@@ -126,6 +131,7 @@ public class AlarmsCommandTests
         fakeService.UnsubscribeAlarmsCalled.ShouldBeTrue();
     }
 
+    /// <summary>Verifies that Execute disconnects in finally block.</summary>
     [Fact]
     public async Task Execute_DisconnectsInFinally()
     {