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/EventPumpStreamFaultTests.cs

@@ -18,6 +18,7 @@ public sealed class EventPumpStreamFaultTests
 {
     private const int WaitMs = 2_000;
 
+    /// <summary>Verifies that stream fault invokes the callback with the exception.</summary>
     [Fact]
     public async Task StreamFault_InvokesOnStreamFaultCallback_WithTheCause()
     {
@@ -40,6 +41,7 @@ public sealed class EventPumpStreamFaultTests
         (await faultObserved.Task).ShouldBeOfType<IOException>();
     }
 
+    /// <summary>Verifies that stream fault drives the reconnect supervisor through reopen and replay.</summary>
     [Fact]
     public async Task StreamFault_DrivesReconnectSupervisorReopenReplay()
     {
@@ -76,6 +78,7 @@ public sealed class EventPumpStreamFaultTests
         supervisor.IsDegraded.ShouldBeFalse();
     }
 
+    /// <summary>Verifies that a faulted pump cannot be restarted in place, but a fresh pump resumes dispatch.</summary>
     [Fact]
     public async Task FaultedPump_IsNotRestartableInPlace_ButAFreshPumpResumesDispatch()
     {
@@ -118,6 +121,7 @@ public sealed class EventPumpStreamFaultTests
         staleObserved.ShouldBeFalse("the faulted pump must not dispatch after its stream dropped");
     }
 
+    /// <summary>Verifies that clean shutdown does not invoke the stream fault callback.</summary>
     [Fact]
     public async Task CleanShutdown_DoesNotInvokeOnStreamFault()
     {
@@ -146,17 +150,27 @@ public sealed class EventPumpStreamFaultTests
         private readonly Channel<MxEvent> _stream =
             Channel.CreateUnbounded<MxEvent>(new UnboundedChannelOptions { SingleReader = true });
 
+        /// <summary>Subscribes to multiple tags (test stub).</summary>
+        /// <param name="fullReferences">The tag references to subscribe to.</param>
+        /// <param name="bufferedUpdateIntervalMs">The buffered update interval in milliseconds.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
         public Task<IReadOnlyList<SubscribeResult>> SubscribeBulkAsync(
             IReadOnlyList<string> fullReferences, int bufferedUpdateIntervalMs, CancellationToken cancellationToken)
             => Task.FromResult<IReadOnlyList<SubscribeResult>>([]);
 
+        /// <summary>Unsubscribes from multiple tags (test stub).</summary>
+        /// <param name="itemHandles">The item handles to unsubscribe from.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
         public Task UnsubscribeBulkAsync(IReadOnlyList<int> itemHandles, CancellationToken cancellationToken)
             => Task.CompletedTask;
 
+        /// <summary>Streams events asynchronously (test stub).</summary>
+        /// <param name="cancellationToken">The cancellation token.</param>
         public IAsyncEnumerable<MxEvent> StreamEventsAsync(CancellationToken cancellationToken)
             => _stream.Reader.ReadAllAsync(cancellationToken);
 
         /// <summary>Fault the stream so the pump's <c>await foreach</c> throws.</summary>
+        /// <param name="cause">The exception to complete the stream with.</param>
         public void FaultStream(Exception cause) => _stream.Writer.TryComplete(cause);
     }
 
@@ -169,16 +183,28 @@ public sealed class EventPumpStreamFaultTests
         private readonly Channel<MxEvent> _stream =
             Channel.CreateUnbounded<MxEvent>(new UnboundedChannelOptions { SingleReader = true });
 
+        /// <summary>Subscribes to multiple tags (test stub).</summary>
+        /// <param name="fullReferences">The tag references to subscribe to.</param>
+        /// <param name="bufferedUpdateIntervalMs">The buffered update interval in milliseconds.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
         public Task<IReadOnlyList<SubscribeResult>> SubscribeBulkAsync(
             IReadOnlyList<string> fullReferences, int bufferedUpdateIntervalMs, CancellationToken cancellationToken)
             => Task.FromResult<IReadOnlyList<SubscribeResult>>([]);
 
+        /// <summary>Unsubscribes from multiple tags (test stub).</summary>
+        /// <param name="itemHandles">The item handles to unsubscribe from.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
         public Task UnsubscribeBulkAsync(IReadOnlyList<int> itemHandles, CancellationToken cancellationToken)
             => Task.CompletedTask;
 
+        /// <summary>Streams events asynchronously (test stub).</summary>
+        /// <param name="cancellationToken">The cancellation token.</param>
         public IAsyncEnumerable<MxEvent> StreamEventsAsync(CancellationToken cancellationToken)
             => _stream.Reader.ReadAllAsync(cancellationToken);
 
+        /// <summary>Emits a data change event asynchronously.</summary>
+        /// <param name="itemHandle">The item handle for the data change.</param>
+        /// <param name="value">The numeric value of the change.</param>
         public ValueTask EmitAsync(int itemHandle, double value) =>
             _stream.Writer.WriteAsync(new MxEvent
             {