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/Health/HostConnectivityForwarder.cs

@@ -27,6 +27,10 @@ public sealed class HostConnectivityForwarder : IDisposable
     private readonly ILogger _logger;
     private bool _disposed;
 
+    /// <summary>Initializes a new instance of HostConnectivityForwarder with the given client name, aggregator, and optional logger.</summary>
+    /// <param name="clientName">The client name for the MxAccess connection.</param>
+    /// <param name="aggregator">The host status aggregator to push connectivity state to.</param>
+    /// <param name="logger">The optional logger for diagnostic messages.</param>
     public HostConnectivityForwarder(string clientName, HostStatusAggregator aggregator, ILogger? logger = null)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(clientName);
@@ -39,6 +43,7 @@ public sealed class HostConnectivityForwarder : IDisposable
     ///     Push a transport state into the aggregator. Idempotent at the aggregator layer —
     ///     repeated calls with the same state don't fan out duplicate transitions.
     /// </summary>
+    /// <param name="state">The host connectivity state to push.</param>
     public void SetTransport(HostState state)
     {
         ObjectDisposedException.ThrowIf(_disposed, this);
@@ -49,6 +54,7 @@ public sealed class HostConnectivityForwarder : IDisposable
             _clientName, state);
     }
 
+    /// <summary>Disposes the forwarder and marks it as disposed.</summary>
     public void Dispose()
     {
         // No-op today; reserved for the eventual gw-6 StreamSessionHealth consumer that

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Galaxy/Health/HostStatusAggregator.cs

@@ -53,6 +53,7 @@ public sealed class HostStatusAggregator
     ///     state value differs from the last cached entry. Re-asserting the same
     ///     state is silent.
     /// </summary>
+    /// <param name="status">The host connectivity status to upsert.</param>
     public void Update(HostConnectivityStatus status)
     {
         ArgumentNullException.ThrowIfNull(status);
@@ -87,6 +88,8 @@ public sealed class HostStatusAggregator
     ///     is fired — observers only react to live transitions, not topology
     ///     reductions. Returns <c>true</c> when the host was tracked.
     /// </summary>
+    /// <param name="hostName">The name of the host to remove.</param>
+    /// <returns>True if the host was tracked and removed; false if it was not tracked.</returns>
     public bool Remove(string hostName)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(hostName);

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Galaxy/Health/PerPlatformProbeWatcher.cs

@@ -45,6 +45,11 @@ public sealed class PerPlatformProbeWatcher : IDisposable
     private readonly Lock _syncLock = new();
     private bool _disposed;
 
+    /// <summary>Initializes a new instance of the PerPlatformProbeWatcher class.</summary>
+    /// <param name="subscriber">The Galaxy subscriber for managing probe subscriptions.</param>
+    /// <param name="aggregator">The host status aggregator for tracking platform connectivity.</param>
+    /// <param name="logger">Optional logger for diagnostic messages.</param>
+    /// <param name="bufferedUpdateIntervalMs">Buffered update interval in milliseconds; must be >= 0.</param>
     public PerPlatformProbeWatcher(
         IGalaxySubscriber subscriber,
         HostStatusAggregator aggregator,
@@ -70,6 +75,8 @@ public sealed class PerPlatformProbeWatcher : IDisposable
     ///     Subscribes new entries, unsubscribes dropped ones. Calling with the same set is
     ///     a no-op.
     /// </summary>
+    /// <param name="platformTagNames">The platform tag names to synchronize.</param>
+    /// <param name="cancellationToken">A cancellation token to cancel the operation.</param>
     public async Task SyncPlatformsAsync(
         IEnumerable<string> platformTagNames, CancellationToken cancellationToken)
     {
@@ -149,6 +156,9 @@ public sealed class PerPlatformProbeWatcher : IDisposable
     ///     <see cref="ProbeSuffix"/>, or a probe for a platform we're not tracking) are
     ///     silently dropped.
     /// </summary>
+    /// <param name="fullReference">The full reference path of the probe attribute.</param>
+    /// <param name="value">The probe value to decode.</param>
+    /// <param name="qualityByte">The quality byte for the value.</param>
     public void OnProbeValueChanged(string fullReference, object? value, byte qualityByte)
     {
         if (_disposed) return;
@@ -166,6 +176,9 @@ public sealed class PerPlatformProbeWatcher : IDisposable
     ///     Decode a ScanState value + raw quality byte to a <see cref="HostState"/>.
     ///     Public for tests that want to pin the decoding table.
     /// </summary>
+    /// <param name="value">The probe value to decode.</param>
+    /// <param name="qualityByte">The quality byte for the value.</param>
+    /// <returns>The decoded host state.</returns>
     public static HostState DecodeState(object? value, byte qualityByte)
     {
         if (qualityByte < 192) return HostState.Unknown;
@@ -182,6 +195,7 @@ public sealed class PerPlatformProbeWatcher : IDisposable
         };
     }
 
+    /// <summary>Disposes the probe watcher and unsubscribes all tracked platforms.</summary>
     public void Dispose()
     {
         if (_disposed) return;