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.AbLegacy.Tests/AbLegacyDriverTests.cs

@@ -9,6 +9,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.AbLegacy.Tests;
 [Trait("Category", "Unit")]
 public sealed class AbLegacyDriverTests
 {
+    /// <summary>Verifies that driver type is AbLegacy.</summary>
     [Fact]
     public void DriverType_is_AbLegacy()
     {
@@ -17,6 +18,7 @@ public sealed class AbLegacyDriverTests
         drv.DriverInstanceId.ShouldBe("drv-1");
     }
 
+    /// <summary>Verifies that InitializeAsync with devices assigns family profiles.</summary>
     [Fact]
     public async Task InitializeAsync_with_devices_assigns_family_profiles()
     {
@@ -38,6 +40,7 @@ public sealed class AbLegacyDriverTests
         drv.GetDeviceState("ab://10.0.0.7/1,0")!.Profile.ShouldBe(AbLegacyPlcFamilyProfile.Plc5);
     }
 
+    /// <summary>Verifies that InitializeAsync with malformed host address faults.</summary>
     [Fact]
     public async Task InitializeAsync_with_malformed_host_address_faults()
     {
@@ -51,6 +54,7 @@ public sealed class AbLegacyDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Faulted);
     }
 
+    /// <summary>Verifies that ShutdownAsync clears devices.</summary>
     [Fact]
     public async Task ShutdownAsync_clears_devices()
     {
@@ -65,6 +69,7 @@ public sealed class AbLegacyDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Unknown);
     }
 
+    /// <summary>Verifies that family profiles expose expected defaults.</summary>
     [Fact]
     public void Family_profiles_expose_expected_defaults()
     {
@@ -82,6 +87,9 @@ public sealed class AbLegacyDriverTests
         AbLegacyPlcFamilyProfile.LogixPccc.SupportsLongFile.ShouldBeTrue();
     }
 
+    /// <summary>Verifies that ForFamily dispatches correctly.</summary>
+    /// <param name="family">The PLC family to dispatch for.</param>
+    /// <param name="expectedAttribute">The expected libplctag PLC attribute.</param>
     [Theory]
     [InlineData(AbLegacyPlcFamily.Slc500, "slc500")]
     [InlineData(AbLegacyPlcFamily.MicroLogix, "micrologix")]
@@ -92,6 +100,7 @@ public sealed class AbLegacyDriverTests
         AbLegacyPlcFamilyProfile.ForFamily(family).LibplctagPlcAttribute.ShouldBe(expectedAttribute);
     }
 
+    /// <summary>Verifies that data type mapping covers atomic PCCC types.</summary>
     [Fact]
     public void DataType_mapping_covers_atomic_pccc_types()
     {
@@ -105,6 +114,7 @@ public sealed class AbLegacyDriverTests
 
     // ---- Driver.AbLegacy-012: profile fields consumed ----
 
+    /// <summary>Verifies that EffectiveCipPath falls back to profile default when host path is empty.</summary>
     [Fact]
     public async Task EffectiveCipPath_falls_back_to_profile_default_when_host_path_is_empty()
     {
@@ -124,6 +134,7 @@ public sealed class AbLegacyDriverTests
         factory.Tags["N7:0"].CreationParams.CipPath.ShouldBe("1,0");
     }
 
+    /// <summary>Verifies that EffectiveCipPath preserves explicit host path.</summary>
     [Fact]
     public async Task EffectiveCipPath_preserves_explicit_host_path()
     {
@@ -142,6 +153,7 @@ public sealed class AbLegacyDriverTests
         factory.Tags["N7:0"].CreationParams.CipPath.ShouldBe("1,2");
     }
 
+    /// <summary>Verifies that long tag on MicroLogix device is rejected at initialization.</summary>
     [Fact]
     public async Task Long_tag_on_MicroLogix_device_rejected_at_init()
     {
@@ -157,6 +169,7 @@ public sealed class AbLegacyDriverTests
         ex.Message.ShouldContain("L-files");
     }
 
+    /// <summary>Verifies that long tag on SLC 500 device is accepted.</summary>
     [Fact]
     public async Task Long_tag_on_Slc500_device_accepted()
     {
@@ -172,6 +185,7 @@ public sealed class AbLegacyDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Healthy);
     }
 
+    /// <summary>Verifies that string tag on PLC-5 device is rejected at initialization.</summary>
     [Fact]
     public async Task String_tag_on_Plc5_device_rejected_at_init()
     {