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.

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Galaxy/Runtime/GatewayGalaxySubscriber.cs

@@ -21,11 +21,18 @@ public sealed class GatewayGalaxySubscriber : IGalaxySubscriber
     private readonly Lock _intervalLock = new();
     private int _lastAppliedIntervalMs = -1; // -1 = never applied; 0 = explicit "use gw default"
 
+    /// <summary>Initializes a new instance of GatewayGalaxySubscriber.</summary>
+    /// <param name="session">The Galaxy MX session to use for subscription operations.</param>
     public GatewayGalaxySubscriber(GalaxyMxSession session)
     {
         _session = session ?? throw new ArgumentNullException(nameof(session));
     }
 
+    /// <summary>Subscribes to a bulk list of Galaxy references with optional buffered update interval.</summary>
+    /// <param name="fullReferences">The full Galaxy tag references to subscribe to.</param>
+    /// <param name="bufferedUpdateIntervalMs">The buffered update interval in milliseconds.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>A task that returns a list of subscribe results.</returns>
     public async Task<IReadOnlyList<SubscribeResult>> SubscribeBulkAsync(
         IReadOnlyList<string> fullReferences, int bufferedUpdateIntervalMs, CancellationToken cancellationToken)
     {
@@ -93,6 +100,10 @@ public sealed class GatewayGalaxySubscriber : IGalaxySubscriber
         }
     }
 
+    /// <summary>Unsubscribes from a bulk list of item handles.</summary>
+    /// <param name="itemHandles">The item handles to unsubscribe from.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>A task representing the unsubscribe operation.</returns>
     public async Task UnsubscribeBulkAsync(IReadOnlyList<int> itemHandles, CancellationToken cancellationToken)
     {
         if (itemHandles.Count == 0) return;
@@ -106,6 +117,9 @@ public sealed class GatewayGalaxySubscriber : IGalaxySubscriber
             .ConfigureAwait(false);
     }
 
+    /// <summary>Streams Galaxy MX events asynchronously.</summary>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>An async enumerable of MX events.</returns>
     public IAsyncEnumerable<MxEvent> StreamEventsAsync(CancellationToken cancellationToken)
     {
         var session = _session.Session