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.Host.Tests/CentralControlEndToEndTests.cs

@@ -62,6 +62,10 @@ public class CentralControlEndToEndTests : IAsyncLifetime
             NullLogger<CentralControlGrpcService>.Instance,
             Options.Create(new CommunicationOptions()));
         _service.SetReady(stub);
+        // The two ingest RPCs Ask the audit-ingest singleton DIRECTLY (no CentralCommunicationActor
+        // relay any more), so the service needs its own proxy handed over. Reusing the same stub
+        // keeps one actor answering both shapes.
+        _service.SetAuditIngestActor(stub);
 
         var pskProvider = new MapPskProvider(new Dictionary<string, string>
         {
@@ -174,7 +178,7 @@ public class CentralControlEndToEndTests : IAsyncLifetime
     // ---- One RPC per shape: unary (above) + the ingest bridge ----
 
     [Fact]
-    public async Task IngestAuditEvents_DecodesTheBatch_AsksTheActor_EncodesTheAck()
+    public async Task IngestAuditEvents_DecodesTheBatch_AsksTheIngestProxy_EncodesTheAck()
     {
         var client = Client(SiteAKey, SiteA);
 
@@ -185,12 +189,13 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         var ack = await client.IngestAuditEventsAsync(batch);
 
         // The stub actor accepts one deterministic id per non-empty batch; its presence proves
-        // the full DTO→command→Ask→reply→ack bridge ran, gated call and all.
+        // the full DTO→command→Ask→reply→ack bridge ran straight to the ingest proxy, gated
+        // call and all.
         Assert.Contains(AcceptedId.ToString(), ack.AcceptedEventIds);
     }
 
     [Fact]
-    public async Task IngestAuditEvents_EmptyBatch_ShortCircuits_WithoutAskingTheActor()
+    public async Task IngestAuditEvents_EmptyBatch_ShortCircuits_WithoutAskingTheIngestProxy()
     {
         // Even the empty-batch fast path is behind the gate — it still needs a valid key.
         var client = Client(SiteAKey, SiteA);
@@ -238,9 +243,9 @@ public class CentralControlEndToEndTests : IAsyncLifetime
     }
 
     /// <summary>
-    /// Minimal stand-in for <c>CentralCommunicationActor</c>: answers the two RPC shapes this
-    /// test exercises. Replies straight to the Ask's temp sender, exactly as the real actor's
-    /// Forward/PipeTo paths do.
+    /// Minimal stand-in for both actors the service Asks — <c>CentralCommunicationActor</c> for
+    /// the unary control RPCs and the <c>audit-log-ingest</c> singleton for the ingest ones.
+    /// Replies straight to the Ask's temp sender, exactly as the real actors do.
     /// </summary>
     private sealed class StubCentralActor : ReceiveActor
     {