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/NodeIdParserTests.cs

@@ -7,24 +7,28 @@ namespace ZB.MOM.WW.OtOpcUa.Client.CLI.Tests;
 
 public class NodeIdParserTests
 {
+    /// <summary>Verifies that Parse returns null for null input.</summary>
     [Fact]
     public void Parse_NullInput_ReturnsNull()
     {
         NodeIdParser.Parse(null).ShouldBeNull();
     }
 
+    /// <summary>Verifies that Parse returns null for empty string input.</summary>
     [Fact]
     public void Parse_EmptyString_ReturnsNull()
     {
         NodeIdParser.Parse("").ShouldBeNull();
     }
 
+    /// <summary>Verifies that Parse returns null for whitespace-only input.</summary>
     [Fact]
     public void Parse_WhitespaceOnly_ReturnsNull()
     {
         NodeIdParser.Parse("   ").ShouldBeNull();
     }
 
+    /// <summary>Verifies that Parse correctly parses standard NodeId format (ns=2;s=MyNode).</summary>
     [Fact]
     public void Parse_StandardStringFormat_ReturnsNodeId()
     {
@@ -34,6 +38,7 @@ public class NodeIdParserTests
         result.Identifier.ShouldBe("MyNode");
     }
 
+    /// <summary>Verifies that Parse correctly parses numeric NodeId format (i=85).</summary>
     [Fact]
     public void Parse_NumericFormat_ReturnsNodeId()
     {
@@ -42,6 +47,7 @@ public class NodeIdParserTests
         result.IdType.ShouldBe(IdType.Numeric);
     }
 
+    /// <summary>Verifies that Parse treats bare numeric input as namespace 0 numeric NodeId.</summary>
     [Fact]
     public void Parse_BareNumeric_ReturnsNamespace0NumericNodeId()
     {
@@ -51,6 +57,7 @@ public class NodeIdParserTests
         result.Identifier.ShouldBe((uint)85);
     }
 
+    /// <summary>Verifies that Parse trims whitespace padding from input.</summary>
     [Fact]
     public void Parse_WithWhitespacePadding_Trims()
     {
@@ -59,24 +66,28 @@ public class NodeIdParserTests
         result.Identifier.ShouldBe("MyNode");
     }
 
+    /// <summary>Verifies that Parse throws FormatException for invalid input.</summary>
     [Fact]
     public void Parse_InvalidFormat_ThrowsFormatException()
     {
         Should.Throw<FormatException>(() => NodeIdParser.Parse("not-a-node-id"));
     }
 
+    /// <summary>Verifies that ParseRequired throws ArgumentException for null input.</summary>
     [Fact]
     public void ParseRequired_NullInput_ThrowsArgumentException()
     {
         Should.Throw<ArgumentException>(() => NodeIdParser.ParseRequired(null));
     }
 
+    /// <summary>Verifies that ParseRequired throws ArgumentException for empty input.</summary>
     [Fact]
     public void ParseRequired_EmptyInput_ThrowsArgumentException()
     {
         Should.Throw<ArgumentException>(() => NodeIdParser.ParseRequired(""));
     }
 
+    /// <summary>Verifies that ParseRequired returns a NodeId for valid input.</summary>
     [Fact]
     public void ParseRequired_ValidInput_ReturnsNodeId()
     {