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/AbCipDriverReadTests.cs

@@ -21,6 +21,7 @@ public sealed class AbCipDriverReadTests
         return (drv, factory);
     }
 
+    /// <summary>Verifies that an unknown reference maps to BadNodeIdUnknown status.</summary>
     [Fact]
     public async Task Unknown_reference_maps_to_BadNodeIdUnknown()
     {
@@ -33,6 +34,7 @@ public sealed class AbCipDriverReadTests
         snapshots.Single().Value.ShouldBeNull();
     }
 
+    /// <summary>Verifies that a tag on an unknown device maps to BadNodeIdUnknown status.</summary>
     [Fact]
     public async Task Tag_on_unknown_device_maps_to_BadNodeIdUnknown()
     {
@@ -49,6 +51,7 @@ public sealed class AbCipDriverReadTests
         snapshots.Single().StatusCode.ShouldBe(AbCipStatusMapper.BadNodeIdUnknown);
     }
 
+    /// <summary>Verifies that a successful DInt read returns Good status with the correct value.</summary>
     [Fact]
     public async Task Successful_DInt_read_returns_Good_with_value()
     {
@@ -67,6 +70,7 @@ public sealed class AbCipDriverReadTests
         factory.Tags["Motor1.Speed"].ReadCount.ShouldBe(1);
     }
 
+    /// <summary>Verifies that repeated reads reuse the runtime without reinitializing.</summary>
     [Fact]
     public async Task Repeat_read_reuses_runtime_without_reinitialise()
     {
@@ -83,6 +87,7 @@ public sealed class AbCipDriverReadTests
         factory.Tags["Motor1.Speed"].ReadCount.ShouldBe(3);
     }
 
+    /// <summary>Verifies that non-zero libplctag status is mapped via AbCipStatusMapper.</summary>
     [Fact]
     public async Task NonZero_libplctag_status_maps_via_AbCipStatusMapper()
     {
@@ -97,6 +102,7 @@ public sealed class AbCipDriverReadTests
         snapshots.Single().Value.ShouldBeNull();
     }
 
+    /// <summary>Verifies that an exception during read surfaces BadCommunicationError status.</summary>
     [Fact]
     public async Task Exception_during_read_surfaces_BadCommunicationError()
     {
@@ -112,6 +118,7 @@ public sealed class AbCipDriverReadTests
         drv.GetHealth().State.ShouldBe(DriverState.Degraded);
     }
 
+    /// <summary>Verifies that batched reads preserve order and per-tag status.</summary>
     [Fact]
     public async Task Batched_reads_preserve_order_and_per_tag_status()
     {
@@ -136,6 +143,7 @@ public sealed class AbCipDriverReadTests
         snapshots.ShouldAllBe(s => s.StatusCode == AbCipStatusMapper.Good);
     }
 
+    /// <summary>Verifies that a successful read marks health as Healthy.</summary>
     [Fact]
     public async Task Successful_read_marks_health_Healthy()
     {
@@ -149,6 +157,7 @@ public sealed class AbCipDriverReadTests
         drv.GetHealth().LastSuccessfulRead.ShouldNotBeNull();
     }
 
+    /// <summary>Verifies that tag creation parameters are built correctly from device and profile.</summary>
     [Fact]
     public async Task TagCreateParams_are_built_from_device_and_profile()
     {
@@ -166,6 +175,7 @@ public sealed class AbCipDriverReadTests
         p.TagName.ShouldBe("Program:P.Counter");
     }
 
+    /// <summary>Verifies that cancellation propagates from read operations.</summary>
     [Fact]
     public async Task Cancellation_propagates_from_read()
     {
@@ -183,6 +193,7 @@ public sealed class AbCipDriverReadTests
             () => drv.ReadAsync(["Slow"], cts.Token));
     }
 
+    /// <summary>Verifies that ShutdownAsync disposes each tag runtime.</summary>
     [Fact]
     public async Task ShutdownAsync_disposes_each_tag_runtime()
     {
@@ -199,6 +210,7 @@ public sealed class AbCipDriverReadTests
         factory.Tags["B"].Disposed.ShouldBeTrue();
     }
 
+    /// <summary>Verifies that initialization failure disposes the tag and surfaces communication error.</summary>
     [Fact]
     public async Task Initialize_failure_disposes_tag_and_surfaces_communication_error()
     {