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.FOCAS.Cli.Tests/FocasCommandBaseValidationTests.cs

@@ -22,14 +22,20 @@ public sealed class FocasCommandBaseValidationTests
     [Command("noop-test", Description = "Test-only probe of FocasCommandBase.ValidateOptions.")]
     private sealed class Probe : FocasCommandBase
     {
+        /// <summary>Gets or sets the interval in milliseconds.</summary>
         public int IntervalMs { get; init; }
 
+        /// <inheritdoc />
         public override ValueTask ExecuteAsync(IConsole console) => default;
 
+        /// <summary>Invokes option validation with interval.</summary>
         public void InvokeValidate() => ValidateOptions(IntervalMs);
+
+        /// <summary>Invokes option validation without interval.</summary>
         public void InvokeValidateNoInterval() => ValidateOptions(intervalMs: null);
     }
 
+    /// <summary>Verifies that default options are accepted.</summary>
     [Fact]
     public void Validate_accepts_default_options()
     {
@@ -37,6 +43,8 @@ public sealed class FocasCommandBaseValidationTests
         Should.NotThrow(() => sut.InvokeValidate());
     }
 
+    /// <summary>Verifies that out-of-range CNC port is rejected.</summary>
+    /// <param name="port">The port value to test.</param>
     [Theory]
     [InlineData(0)]
     [InlineData(-1)]
@@ -48,6 +56,8 @@ public sealed class FocasCommandBaseValidationTests
         ex.Message.ShouldContain("cnc-port", Case.Insensitive);
     }
 
+    /// <summary>Verifies that non-positive timeout is rejected.</summary>
+    /// <param name="timeoutMs">The timeout value in milliseconds to test.</param>
     [Theory]
     [InlineData(0)]
     [InlineData(-100)]
@@ -58,6 +68,8 @@ public sealed class FocasCommandBaseValidationTests
         ex.Message.ShouldContain("timeout-ms", Case.Insensitive);
     }
 
+    /// <summary>Verifies that non-positive interval is rejected.</summary>
+    /// <param name="intervalMs">The interval value in milliseconds to test.</param>
     [Theory]
     [InlineData(0)]
     [InlineData(-500)]
@@ -68,6 +80,7 @@ public sealed class FocasCommandBaseValidationTests
         ex.Message.ShouldContain("interval-ms", Case.Insensitive);
     }
 
+    /// <summary>Verifies that interval check is skipped when command omits it.</summary>
     [Fact]
     public void Validate_skips_interval_check_when_command_omits_it()
     {