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.Historian.Wonderware/Backend/SdkAlarmHistorianWriteBackend.cs

@@ -84,9 +84,15 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
         private string? _activeNode;
         private bool _disposed;
 
+        /// <summary>Initializes a new instance using the default SDK connection factory.</summary>
+        /// <param name="config">The historian configuration.</param>
         public SdkAlarmHistorianWriteBackend(HistorianConfiguration config)
             : this(config, new SdkHistorianConnectionFactory(), null) { }
 
+        /// <summary>Initializes a new instance with injected dependencies (for testing).</summary>
+        /// <param name="config">The historian configuration.</param>
+        /// <param name="factory">The connection factory.</param>
+        /// <param name="picker">The cluster endpoint picker, or null to use a new instance.</param>
         internal SdkAlarmHistorianWriteBackend(
             HistorianConfiguration config,
             IHistorianConnectionFactory factory,
@@ -97,6 +103,10 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
             _picker = picker ?? new HistorianClusterEndpointPicker(config);
         }
 
+        /// <summary>Writes a batch of alarm events to the historian, returning outcomes for each event.</summary>
+        /// <param name="events">The alarm events to write.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>An array of outcomes corresponding to each input event.</returns>
         public Task<AlarmHistorianWriteOutcome[]> WriteBatchAsync(
             AlarmHistorianEventDto[] events,
             CancellationToken cancellationToken)
@@ -183,6 +193,8 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
         ///     event properties — operator-comment fidelity is the field the value-driven
         ///     fallback path cannot carry.
         /// </summary>
+        /// <param name="dto">The alarm event data transfer object.</param>
+        /// <returns>The mapped HistorianEvent.</returns>
         internal static HistorianEvent ToHistorianEvent(AlarmHistorianEventDto dto)
         {
             // The ArchestrA SDK marks these HistorianEvent members obsolete but still honours
@@ -238,6 +250,8 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
         ///     <see cref="AahClientManagedAlarmEventWriter.MapOutcome"/> mapping. Exposed for
         ///     unit tests — connection-class codes are handled separately by the batch loop.
         /// </summary>
+        /// <param name="code">The error code to classify.</param>
+        /// <returns>The corresponding write outcome.</returns>
         internal static AlarmHistorianWriteOutcome ClassifyOutcome(HistorianAccessError.ErrorValue code)
             => AahClientManagedAlarmEventWriter.MapOutcome(
                 (int)code,
@@ -365,6 +379,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
             RequestTimeoutSeconds = _config.RequestTimeoutSeconds,
         };
 
+        /// <summary>Disposes the connection and releases resources.</summary>
         public void Dispose()
         {
             if (_disposed) return;