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/SubscriptionRegistry.cs

@@ -26,7 +26,9 @@ internal sealed class SubscriptionRegistry
     private readonly ConcurrentDictionary<int, ImmutableHashSet<long>> _subscribersByItemHandle = new();
     private long _nextSubscriptionId;
 
+    /// <summary>Gets the number of tracked subscriptions.</summary>
     public int TrackedSubscriptionCount => _bySubscriptionId.Count;
+    /// <summary>Gets the number of tracked item handles.</summary>
     public int TrackedItemHandleCount => _subscribersByItemHandle.Count;
 
     /// <summary>Allocate a fresh subscription id. Monotonic; unique per registry lifetime.</summary>
@@ -37,6 +39,8 @@ internal sealed class SubscriptionRegistry
     ///     Failed tags (item handle = 0 or negative) are stored anyway so unsubscribe can
     ///     emit per-tag UnsubscribeBulk for the ones that did succeed.
     /// </summary>
+    /// <param name="subscriptionId">The subscription identifier.</param>
+    /// <param name="bindings">The tag bindings for the subscription.</param>
     public void Register(long subscriptionId, IReadOnlyList<TagBinding> bindings)
     {
         var entry = new SubscriptionEntry(subscriptionId, bindings);
@@ -55,6 +59,8 @@ internal sealed class SubscriptionRegistry
     ///     Remove a subscription. Returns the bindings the caller should pass to
     ///     <c>UnsubscribeBulkAsync</c>; null when the id was never registered.
     /// </summary>
+    /// <param name="subscriptionId">The subscription identifier.</param>
+    /// <returns>The bindings for the subscription, or null if not found.</returns>
     public IReadOnlyList<TagBinding>? Remove(long subscriptionId)
     {
         if (!_bySubscriptionId.TryRemove(subscriptionId, out var entry)) return null;
@@ -83,6 +89,8 @@ internal sealed class SubscriptionRegistry
     ///     scan of the binding list. At 50k tags / 1Hz this turns each dispatch from a
     ///     50k-element scan into a single dictionary lookup.
     /// </remarks>
+    /// <param name="itemHandle">The gateway item handle.</param>
+    /// <returns>A list of subscription and reference pairs for the item handle.</returns>
     public IReadOnlyList<(long SubscriptionId, string FullReference)> ResolveSubscribers(int itemHandle)
     {
         if (!_subscribersByItemHandle.TryGetValue(itemHandle, out var bag)) return [];
@@ -117,6 +125,8 @@ internal sealed class SubscriptionRegistry
     ///     handles dispatch and the now-dead pre-reconnect handles are dropped. No-op when the
     ///     subscription id is unknown (it was unsubscribed during the reconnect window).
     /// </summary>
+    /// <param name="subscriptionId">The subscription identifier.</param>
+    /// <param name="newBindings">The new tag bindings after reconnection.</param>
     public void Rebind(long subscriptionId, IReadOnlyList<TagBinding> newBindings)
     {
         if (!_bySubscriptionId.TryGetValue(subscriptionId, out var oldEntry)) return;
@@ -151,12 +161,19 @@ internal sealed class SubscriptionRegistry
     ///     (Driver.Galaxy-012). Failed bindings (item handle ≤ 0) are excluded from the
     ///     index because the EventPump only dispatches for positive handles.
     /// </summary>
+    /// <summary>Per-subscription bookkeeping entry.</summary>
     private sealed class SubscriptionEntry
     {
+        /// <summary>Gets the subscription identifier.</summary>
         public long SubscriptionId { get; }
+        /// <summary>Gets the tag bindings for the subscription.</summary>
         public IReadOnlyList<TagBinding> Bindings { get; }
+        /// <summary>Gets the index of full references by item handle.</summary>
         public IReadOnlyDictionary<int, string> FullRefByItemHandle { get; }
 
+        /// <summary>Initializes a new subscription entry.</summary>
+        /// <param name="subscriptionId">The subscription identifier.</param>
+        /// <param name="bindings">The tag bindings for the subscription.</param>
         public SubscriptionEntry(long subscriptionId, IReadOnlyList<TagBinding> bindings)
         {
             SubscriptionId = subscriptionId;