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/ZB.MOM.WW.OtOpcUa.Driver.AbCip.Tests/AbCipHostAddressTests.cs

@@ -7,6 +7,11 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.AbCip.Tests;
 [Trait("Category", "Unit")]
 public sealed class AbCipHostAddressTests
 {
+    /// <summary>Verifies that TryParse accepts valid address forms.</summary>
+    /// <param name="input">The raw URI string to parse.</param>
+    /// <param name="gateway">The expected gateway host.</param>
+    /// <param name="port">The expected port number.</param>
+    /// <param name="cipPath">The expected CIP path.</param>
     [Theory]
     [InlineData("ab://10.0.0.5/1,0", "10.0.0.5", 44818, "1,0")]
     [InlineData("ab://10.0.0.5/1,4", "10.0.0.5", 44818, "1,4")]
@@ -25,6 +30,8 @@ public sealed class AbCipHostAddressTests
         parsed.CipPath.ShouldBe(cipPath);
     }
 
+    /// <summary>Verifies that TryParse rejects invalid address forms.</summary>
+    /// <param name="input">The invalid or null URI string to test.</param>
     [Theory]
     [InlineData(null)]
     [InlineData("")]
@@ -41,6 +48,11 @@ public sealed class AbCipHostAddressTests
         AbCipHostAddress.TryParse(input).ShouldBeNull();
     }
 
+    /// <summary>Verifies that ToString canonicalises the address format.</summary>
+    /// <param name="gateway">The gateway host component.</param>
+    /// <param name="port">The port number.</param>
+    /// <param name="path">The CIP path component.</param>
+    /// <param name="expected">The expected canonical string representation.</param>
     [Theory]
     [InlineData("10.0.0.5", 44818, "1,0", "ab://10.0.0.5/1,0")]
     [InlineData("10.0.0.5", 2222, "1,0", "ab://10.0.0.5:2222/1,0")]
@@ -51,6 +63,7 @@ public sealed class AbCipHostAddressTests
         addr.ToString().ShouldBe(expected);
     }
 
+    /// <summary>Verifies that round-trip parsing and formatting is stable.</summary>
     [Fact]
     public void RoundTrip_is_stable()
     {