refactor(driver-pages): address post-review follow-ups

- DriverInstanceSpec carries ClusterId from the deployment artifact;
  DriverHostActor threads the real cluster identity into
  DriverInstanceActor instead of the local NodeId. Old pre-PR
  artifacts without a ClusterId field fall back to the NodeId so
  in-flight deployments keep working.
- DriverHostActor.ChildEntry holds the full DriverInstanceSpec
  (was only carrying DriverType + LastConfigJson). Restart respawns
  preserve RowId, Name, Enabled, ClusterId — no placeholder values.
- Drop the unnecessary _faultLock on DriverInstanceActor — every
  read/write site runs inside an Akka message handler which is
  single-threaded per actor instance.
- DriverStatusPanel.DisposeAsync awaits Timer.DisposeAsync so an
  in-flight 5s tick can't invoke StateHasChanged on a component
  whose hub has already been torn down.

src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverInstanceActor.cs

@@ -72,9 +72,12 @@ public sealed class DriverInstanceActor : ReceiveActor, IWithTimers
     private readonly ILoggingAdapter _log = Context.GetLogger();
     private string? _currentConfigJson;
 
-    /// <summary>Timestamps of recent Faulted-state transitions; used to compute the 5-minute error count.</summary>
+    /// <summary>
+    ///     Timestamps of recent Faulted-state transitions; used to compute the 5-minute error count.
+    ///     No lock needed — every read/write site runs inside an Akka message handler, which is
+    ///     single-threaded per actor instance.
+    /// </summary>
     private readonly Queue<DateTime> _faultTimestamps = new();
-    private readonly object _faultLock = new();
 
     /// <summary>Active subscription handle (null when not subscribed). Lifetime is one-per-actor —
     /// re-subscribe across reconnects is the consumer's responsibility today (subscribe-once
@@ -412,28 +415,19 @@ public sealed class DriverInstanceActor : ReceiveActor, IWithTimers
 
     private static bool IsGoodStatus(uint statusCode) => (statusCode >> 30) == 0;
 
-    /// <summary>
-    ///     Records a transition into a Faulted / error state for the 5-minute sliding counter.
-    ///     Thread-safe: called from actor message-handling (single-threaded) but guard is cheap.
-    /// </summary>
+    /// <summary>Records a transition into a Faulted / error state for the 5-minute sliding counter.</summary>
     private void RecordFault()
     {
-        lock (_faultLock)
-        {
-            _faultTimestamps.Enqueue(DateTime.UtcNow);
-        }
+        _faultTimestamps.Enqueue(DateTime.UtcNow);
     }
 
     /// <summary>Returns how many fault transitions occurred in the last 5 minutes.</summary>
     private int ErrorCount5Min()
     {
         var cutoff = DateTime.UtcNow.AddMinutes(-5);
-        lock (_faultLock)
-        {
-            while (_faultTimestamps.Count > 0 && _faultTimestamps.Peek() < cutoff)
-                _faultTimestamps.Dequeue();
-            return _faultTimestamps.Count;
-        }
+        while (_faultTimestamps.Count > 0 && _faultTimestamps.Peek() < cutoff)
+            _faultTimestamps.Dequeue();
+        return _faultTimestamps.Count;
     }
 
     /// <summary>