Add security classification, alarm detection, historical data access, and primitive grouping

Wire Galaxy security_classification to OPC UA AccessLevel (ReadOnly for SecuredWrite/VerifiedWrite/ViewOnly).
Use deployed package chain for attribute queries to exclude undeployed attributes.
Group primitive attributes under their parent variable node (merged Variable+Object).
Add is_historized and is_alarm detection via HistoryExtension/AlarmExtension primitives.
Implement OPC UA HistoryRead backed by Wonderware Historian Runtime database.
Implement AlarmConditionState nodes driven by InAlarm with condition refresh support.
Add historyread and alarms CLI commands for testing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tools/opcuacli-dotnet/Commands/SubscribeCommand.cs

@@ -48,11 +48,11 @@ public class SubscribeCommand : ICommand
             SamplingInterval = Interval
         };
 
-        item.Notification += (_, e) =>
+        item.Notification += (monitoredItem, e) =>
         {
             if (e.NotificationValue is MonitoredItemNotification notification)
             {
-                console.Output.WriteLine(
+                Console.WriteLine(
                     $"[{notification.Value.SourceTimestamp:O}] {NodeId} = {notification.Value.Value} ({notification.Value.StatusCode})");
             }
         };
@@ -66,8 +66,18 @@ public class SubscribeCommand : ICommand
 
         var ct = console.RegisterCancellationHandler();
 
-        try { await Task.Delay(Timeout.Infinite, ct); }
-        catch (OperationCanceledException) { }
+        int tick = 0;
+        while (!ct.IsCancellationRequested)
+        {
+            await Task.Delay(2000, ct).ContinueWith(_ => { });
+            tick++;
+            Console.WriteLine(
+                $"  [tick {tick}] Session={session.Connected}, Sub.Id={subscription.Id}, " +
+                $"PublishingEnabled={subscription.PublishingEnabled}, " +
+                $"MonitoredItemCount={subscription.MonitoredItemCount}, " +
+                $"ItemStatus={item.Status?.Id}, " +
+                $"LastNotification={((item.LastValue as MonitoredItemNotification)?.Value?.Value)} ({((item.LastValue as MonitoredItemNotification)?.Value?.StatusCode)})");
+        }
 
         await console.Output.WriteLineAsync("Unsubscribed.");
     }