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.Galaxy.Tests/Runtime/GalaxyTelemetryTests.cs

@@ -30,6 +30,7 @@ public sealed class GalaxyTelemetryTests
         return (listener, captured);
     }
 
+    /// <summary>Verifies that TracedGalaxySubscriber emits a subscribe_bulk span with tag count.</summary>
     [Fact]
     public async Task TracedGalaxySubscriber_emits_subscribe_bulk_span_with_tag_count()
     {
@@ -50,6 +51,7 @@ public sealed class GalaxyTelemetryTests
         finally { listener.Dispose(); }
     }
 
+    /// <summary>Verifies that TracedGalaxySubscriber records error and rethrows on failure.</summary>
     [Fact]
     public async Task TracedGalaxySubscriber_records_error_and_rethrows_on_failure()
     {
@@ -67,6 +69,7 @@ public sealed class GalaxyTelemetryTests
         finally { listener.Dispose(); }
     }
 
+    /// <summary>Verifies that TracedGalaxyDataWriter tags the secured write count.</summary>
     [Fact]
     public async Task TracedGalaxyDataWriter_tags_secured_write_count()
     {
@@ -102,6 +105,7 @@ public sealed class GalaxyTelemetryTests
         finally { listener.Dispose(); }
     }
 
+    /// <summary>Verifies that TracedGalaxyHierarchySource tags the object count.</summary>
     [Fact]
     public async Task TracedGalaxyHierarchySource_tags_object_count()
     {
@@ -121,6 +125,7 @@ public sealed class GalaxyTelemetryTests
 
     private sealed class FakeSubscriber : IGalaxySubscriber
     {
+        /// <inheritdoc />
         public Task<IReadOnlyList<SubscribeResult>> SubscribeBulkAsync(
             IReadOnlyList<string> fullReferences, int bufferedUpdateIntervalMs, CancellationToken cancellationToken)
             => Task.FromResult<IReadOnlyList<SubscribeResult>>(
@@ -131,9 +136,11 @@ public sealed class GalaxyTelemetryTests
                     WasSuccessful = true,
                 }).ToList());
 
+        /// <inheritdoc />
         public Task UnsubscribeBulkAsync(IReadOnlyList<int> itemHandles, CancellationToken cancellationToken)
             => Task.CompletedTask;
 
+        /// <inheritdoc />
         public async IAsyncEnumerable<MxEvent> StreamEventsAsync(
             [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken cancellationToken)
         {
@@ -144,13 +151,16 @@ public sealed class GalaxyTelemetryTests
 
     private sealed class ThrowingSubscriber : IGalaxySubscriber
     {
+        /// <inheritdoc />
         public Task<IReadOnlyList<SubscribeResult>> SubscribeBulkAsync(
             IReadOnlyList<string> fullReferences, int bufferedUpdateIntervalMs, CancellationToken cancellationToken)
             => throw new InvalidOperationException("gw down");
 
+        /// <inheritdoc />
         public Task UnsubscribeBulkAsync(IReadOnlyList<int> itemHandles, CancellationToken cancellationToken)
             => Task.CompletedTask;
 
+        /// <inheritdoc />
         public async IAsyncEnumerable<MxEvent> StreamEventsAsync(
             [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken cancellationToken)
         {
@@ -161,6 +171,7 @@ public sealed class GalaxyTelemetryTests
 
     private sealed class RecordingWriter : IGalaxyDataWriter
     {
+        /// <inheritdoc />
         public Task<IReadOnlyList<WriteResult>> WriteAsync(
             IReadOnlyList<WriteRequest> writes,
             Func<string, SecurityClassification> securityResolver,
@@ -171,6 +182,7 @@ public sealed class GalaxyTelemetryTests
 
     private sealed class FakeHierarchy : IGalaxyHierarchySource
     {
+        /// <inheritdoc />
         public Task<IReadOnlyList<MxGateway.Contracts.Proto.Galaxy.GalaxyObject>> GetHierarchyAsync(
             CancellationToken cancellationToken)
             => Task.FromResult<IReadOnlyList<MxGateway.Contracts.Proto.Galaxy.GalaxyObject>>(