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.Shared.Tests/Models/ConnectionSettingsTests.cs

@@ -6,6 +6,7 @@ namespace ZB.MOM.WW.OtOpcUa.Client.Shared.Tests.Models;
 
 public class ConnectionSettingsTests
 {
+    /// <summary>Verifies that ConnectionSettings defaults are correct.</summary>
     [Fact]
     public void Defaults_AreCorrect()
     {
@@ -24,6 +25,7 @@ public class ConnectionSettingsTests
         settings.CertificateStorePath.ShouldBe(string.Empty);
     }
 
+    /// <summary>Verifies that validation throws on null endpoint URL.</summary>
     [Fact]
     public void Validate_ThrowsOnNullEndpointUrl()
     {
@@ -32,6 +34,7 @@ public class ConnectionSettingsTests
             .ParamName.ShouldBe("EndpointUrl");
     }
 
+    /// <summary>Verifies that validation throws on empty endpoint URL.</summary>
     [Fact]
     public void Validate_ThrowsOnEmptyEndpointUrl()
     {
@@ -40,6 +43,7 @@ public class ConnectionSettingsTests
             .ParamName.ShouldBe("EndpointUrl");
     }
 
+    /// <summary>Verifies that validation throws on whitespace endpoint URL.</summary>
     [Fact]
     public void Validate_ThrowsOnWhitespaceEndpointUrl()
     {
@@ -48,6 +52,7 @@ public class ConnectionSettingsTests
             .ParamName.ShouldBe("EndpointUrl");
     }
 
+    /// <summary>Verifies that validation throws on zero timeout.</summary>
     [Fact]
     public void Validate_ThrowsOnZeroTimeout()
     {
@@ -60,6 +65,7 @@ public class ConnectionSettingsTests
             .ParamName.ShouldBe("SessionTimeoutSeconds");
     }
 
+    /// <summary>Verifies that validation throws on negative timeout.</summary>
     [Fact]
     public void Validate_ThrowsOnNegativeTimeout()
     {
@@ -72,6 +78,7 @@ public class ConnectionSettingsTests
             .ParamName.ShouldBe("SessionTimeoutSeconds");
     }
 
+    /// <summary>Verifies that validation throws on timeout above 3600 seconds.</summary>
     [Fact]
     public void Validate_ThrowsOnTimeoutAbove3600()
     {
@@ -84,6 +91,7 @@ public class ConnectionSettingsTests
             .ParamName.ShouldBe("SessionTimeoutSeconds");
     }
 
+    /// <summary>Verifies that validation succeeds with valid settings.</summary>
     [Fact]
     public void Validate_SucceedsWithValidSettings()
     {

tests/Client/ZB.MOM.WW.OtOpcUa.Client.Shared.Tests/Models/ModelConstructionTests.cs

@@ -8,6 +8,7 @@ namespace ZB.MOM.WW.OtOpcUa.Client.Shared.Tests.Models;
 
 public class ModelConstructionTests
 {
+    /// <summary>Verifies that BrowseResult constructs correctly with all properties.</summary>
     [Fact]
     public void BrowseResult_ConstructsCorrectly()
     {
@@ -19,6 +20,7 @@ public class ModelConstructionTests
         result.HasChildren.ShouldBeTrue();
     }
 
+    /// <summary>Verifies that BrowseResult correctly sets HasChildren to false.</summary>
     [Fact]
     public void BrowseResult_WithoutChildren()
     {
@@ -26,6 +28,7 @@ public class ModelConstructionTests
         result.HasChildren.ShouldBeFalse();
     }
 
+    /// <summary>Verifies that AlarmEventArgs constructs correctly with all properties.</summary>
     [Fact]
     public void AlarmEventArgs_ConstructsCorrectly()
     {
@@ -42,6 +45,7 @@ public class ModelConstructionTests
         args.Time.ShouldBe(time);
     }
 
+    /// <summary>Verifies that RedundancyInfo constructs correctly with all properties.</summary>
     [Fact]
     public void RedundancyInfo_ConstructsCorrectly()
     {
@@ -54,6 +58,7 @@ public class ModelConstructionTests
         info.ApplicationUri.ShouldBe("urn:server1");
     }
 
+    /// <summary>Verifies that RedundancyInfo handles empty URIs correctly.</summary>
     [Fact]
     public void RedundancyInfo_WithEmptyUris()
     {
@@ -62,6 +67,7 @@ public class ModelConstructionTests
         info.ApplicationUri.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that DataChangedEventArgs constructs correctly with all properties.</summary>
     [Fact]
     public void DataChangedEventArgs_ConstructsCorrectly()
     {
@@ -73,6 +79,7 @@ public class ModelConstructionTests
         args.Value.Value.ShouldBe(42);
     }
 
+    /// <summary>Verifies that ConnectionStateChangedEventArgs constructs correctly with all properties.</summary>
     [Fact]
     public void ConnectionStateChangedEventArgs_ConstructsCorrectly()
     {
@@ -84,6 +91,7 @@ public class ModelConstructionTests
         args.EndpointUrl.ShouldBe("opc.tcp://localhost:4840");
     }
 
+    /// <summary>Verifies that ConnectionInfo constructs correctly with all properties.</summary>
     [Fact]
     public void ConnectionInfo_ConstructsCorrectly()
     {
@@ -103,6 +111,7 @@ public class ModelConstructionTests
         info.SessionName.ShouldBe("TestSession");
     }
 
+    /// <summary>Verifies that SecurityMode enum has the expected number of values.</summary>
     [Fact]
     public void SecurityMode_Enum_HasExpectedValues()
     {
@@ -112,6 +121,7 @@ public class ModelConstructionTests
         ((int)SecurityMode.SignAndEncrypt).ShouldBe(2);
     }
 
+    /// <summary>Verifies that ConnectionState enum has the expected number of values.</summary>
     [Fact]
     public void ConnectionState_Enum_HasExpectedValues()
     {
@@ -122,6 +132,7 @@ public class ModelConstructionTests
         ((int)ConnectionState.Reconnecting).ShouldBe(3);
     }
 
+    /// <summary>Verifies that AggregateType enum has the expected number of values.</summary>
     [Fact]
     public void AggregateType_Enum_HasExpectedValues()
     {