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.TwinCAT.Tests/TwinCATDriverTests.cs

@@ -8,6 +8,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.TwinCAT.Tests;
 [Trait("Category", "Unit")]
 public sealed class TwinCATDriverTests
 {
+    /// <summary>Verifies that the driver type is correctly identified as TwinCAT.</summary>
     [Fact]
     public void DriverType_is_TwinCAT()
     {
@@ -16,6 +17,7 @@ public sealed class TwinCATDriverTests
         drv.DriverInstanceId.ShouldBe("drv-1");
     }
 
+    /// <summary>Verifies that device addresses are parsed during initialization.</summary>
     [Fact]
     public async Task InitializeAsync_parses_device_addresses()
     {
@@ -35,6 +37,7 @@ public sealed class TwinCATDriverTests
         drv.GetDeviceState("ads://10.0.0.1.1.1:852")!.Options.DeviceName.ShouldBe("Machine2");
     }
 
+    /// <summary>Verifies that malformed device addresses cause initialization to fault.</summary>
     [Fact]
     public async Task InitializeAsync_malformed_address_faults()
     {
@@ -48,6 +51,7 @@ public sealed class TwinCATDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Faulted);
     }
 
+    /// <summary>Verifies that shutdown clears all devices.</summary>
     [Fact]
     public async Task ShutdownAsync_clears_devices()
     {
@@ -63,6 +67,7 @@ public sealed class TwinCATDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Unknown);
     }
 
+    /// <summary>Verifies that reinitialization cycles devices.</summary>
     [Fact]
     public async Task ReinitializeAsync_cycles_devices()
     {
@@ -78,6 +83,7 @@ public sealed class TwinCATDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Healthy);
     }
 
+    /// <summary>Verifies that data type mapping covers atomic IEC types.</summary>
     [Fact]
     public void DataType_mapping_covers_atomic_iec_types()
     {
@@ -91,6 +97,9 @@ public sealed class TwinCATDriverTests
         TwinCATDataType.Time.ToDriverDataType().ShouldBe(DriverDataType.UInt32);
     }
 
+    /// <summary>Verifies that status mapper covers known ADS error codes.</summary>
+    /// <param name="adsError">The raw ADS error code to map.</param>
+    /// <param name="expected">The expected OPC UA status code after mapping.</param>
     [Theory]
     [InlineData(0u,     TwinCATStatusMapper.Good)]
     // Device-layer codes — confirmed from Beckhoff.TwinCAT.Ads 7.0.172 AdsErrorCode enum