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/AbCipDriverTests.cs

@@ -9,6 +9,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.AbCip.Tests;
 [Trait("Category", "Unit")]
 public sealed class AbCipDriverTests
 {
+    /// <summary>Verifies AbCipDriver reports correct driver type and instance ID.</summary>
     [Fact]
     public void DriverType_is_AbCip()
     {
@@ -17,6 +18,7 @@ public sealed class AbCipDriverTests
         drv.DriverInstanceId.ShouldBe("drv-1");
     }
 
+    /// <summary>Verifies InitializeAsync with no devices succeeds and marks driver healthy.</summary>
     [Fact]
     public async Task InitializeAsync_with_empty_devices_succeeds_and_marks_healthy()
     {
@@ -25,6 +27,7 @@ public sealed class AbCipDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Healthy);
     }
 
+    /// <summary>Verifies InitializeAsync registers devices with their respective PLC family profiles.</summary>
     [Fact]
     public async Task InitializeAsync_registers_each_device_with_its_family_profile()
     {
@@ -44,6 +47,7 @@ public sealed class AbCipDriverTests
         drv.GetDeviceState("ab://10.0.0.6/")!.Profile.ShouldBe(AbCipPlcFamilyProfile.Micro800);
     }
 
+    /// <summary>Verifies InitializeAsync rejects malformed host addresses and faults the driver.</summary>
     [Fact]
     public async Task InitializeAsync_with_malformed_host_address_faults()
     {
@@ -57,6 +61,7 @@ public sealed class AbCipDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Faulted);
     }
 
+    /// <summary>Verifies ShutdownAsync clears devices and marks driver state unknown.</summary>
     [Fact]
     public async Task ShutdownAsync_clears_devices_and_marks_unknown()
     {
@@ -73,6 +78,7 @@ public sealed class AbCipDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Unknown);
     }
 
+    /// <summary>Verifies ReinitializeAsync stops and restarts all devices.</summary>
     [Fact]
     public async Task ReinitializeAsync_cycles_devices()
     {
@@ -88,6 +94,7 @@ public sealed class AbCipDriverTests
         drv.GetHealth().State.ShouldBe(DriverState.Healthy);
     }
 
+    /// <summary>Verifies PLC family profiles expose expected default configuration values.</summary>
     [Fact]
     public void Family_profiles_expose_expected_defaults()
     {
@@ -103,6 +110,7 @@ public sealed class AbCipDriverTests
         AbCipPlcFamilyProfile.GuardLogix.LibplctagPlcAttribute.ShouldBe("controllogix");
     }
 
+    /// <summary>Verifies AB CIP atomic data types map correctly to driver data types.</summary>
     [Fact]
     public void AbCipDataType_maps_atomics_to_driver_types()
     {