perf(comms+audit): close phase-2 residuals — direct ingest path, monotonic timeouts, synthetic probe, not-reporting set, cursor-exact audit pull

tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/Monitoring/AlarmSummaryRenderTests.cs

@@ -331,6 +331,14 @@ public class AlarmSummaryRenderTests : BunitContext
 
         public bool IsLive(int siteId) => _live;
 
+        /// <summary>
+        /// The aggregator's own fan-out result. Settable so a test can prove the page renders
+        /// the not-reporting list sourced from the live cache while it is serving the site.
+        /// </summary>
+        public IReadOnlyList<string> NotReporting { get; set; } = Array.Empty<string>();
+
+        public IReadOnlyList<string> GetNotReportingInstances(int siteId) => NotReporting;
+
         public void PushAlarms(IReadOnlyList<AlarmStateChanged> alarms)
         {
             _current = alarms;