perf(comms): alarms-only seed, capped buffers, at-least-once audit pull

tests/ZB.MOM.WW.ScadaBridge.IntegrationTests/Grpc/SiteAlarmStreamEndToEndTests.cs

@@ -265,7 +265,7 @@ public class SiteAlarmStreamEndToEndTests : TestKit
     {
         private readonly object _lock = new();
         private IReadOnlyList<AlarmStateChanged>? _latest;
-        public void Publish(IReadOnlyList<AlarmStateChanged> snapshot)
+        public void Publish(IReadOnlyList<AlarmStateChanged> snapshot, bool streamLive)
         {
             lock (_lock) { _latest = snapshot; }
         }
@@ -280,8 +280,9 @@ public class SiteAlarmStreamEndToEndTests : TestKit
     {
         public override Task SubscribeSiteAsync(
             string correlationId, Action<AlarmStateChanged> onAlarmEvent, Action<Exception> onError,
-            Action onCompleted, CancellationToken ct)
+            Action onCompleted, CancellationToken ct, Action? onConnected = null)
         {
+            onConnected?.Invoke();
             var tcs = new TaskCompletionSource();
             ct.Register(() => tcs.TrySetResult());
             return tcs.Task;