perf(adminui): pooled DbContext factory; role-grants reads per-call, not per-circuit

src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ScriptedAlarms/ScriptedAlarmHostActor.cs

@@ -201,6 +201,10 @@ public sealed class ScriptedAlarmHostActor : ReceiveActor
         Receive<ApplyScriptedAlarms>(OnApply);
         Receive<AlarmsLoaded>(OnAlarmsLoaded);
         Receive<VirtualTagActor.DependencyValueChanged>(OnDependencyChanged);
+        // The mux's batched delivery: one message carrying this host's whole matched slice of a driver
+        // burst. The engine upstream is fed per value, so push each item in order — the saving is the
+        // mailbox hop, not the push.
+        Receive<VirtualTagActor.DependencyValueBatch>(OnDependencyBatch);
         Receive<EngineEmission>(OnEngineEmission);
         // Cluster redundancy snapshots (published on the `redundancy-state` topic, subscribed in PreStart)
         // cache this node's role so OnEngineEmission can gate the cluster-wide alerts publish to the Primary.
@@ -395,6 +399,17 @@ public sealed class ScriptedAlarmHostActor : ReceiveActor
             new DataValueSnapshot(msg.Value, msg.StatusCode, msg.TimestampUtc, msg.TimestampUtc));
     }
 
+    /// <summary>One batched mux delivery — every item already matched this host's registered interest.
+    /// Loops the per-value handler, preserving in-burst order.</summary>
+    private void OnDependencyBatch(VirtualTagActor.DependencyValueBatch msg)
+    {
+        var items = msg.Items;
+        for (var i = 0; i < items.Count; i++)
+        {
+            OnDependencyChanged(items[i]);
+        }
+    }
+
     private void OnEngineEmission(EngineEmission msg)
     {
         var e = msg.Event;