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.AuditLog.Tests/Integration/OutageReconciliationTests.cs

@@ -85,7 +85,7 @@ public class OutageReconciliationTests : TestKit, IClassFixture<MsSqlMigrationFi
         }
 
         public async Task<PullAuditEventsResponse> PullAsync(
-            string siteId, DateTime sinceUtc, int batchSize, CancellationToken ct)
+            string siteId, DateTime sinceUtc, string? afterId, int batchSize, CancellationToken ct)
         {
             CallCount++;
 
@@ -94,16 +94,16 @@ public class OutageReconciliationTests : TestKit, IClassFixture<MsSqlMigrationFi
             // is retired FIRST; the rows this call serves are NOT retired, because
             // nothing yet proves central consumed them. A fault between here and
             // central's commit therefore re-serves them on the next tick instead of
-            // losing them. The actor sends no after_id, so the cursor is a bare
-            // timestamp under the inclusive >= read contract and only rows strictly
-            // older than it are provably received.
+            // losing them. The actor now sends the composite (timestamp, id) cursor,
+            // so retirement is exact: the rows AT the cursor instant are proven
+            // received too, where a bare timestamp could only prove strictly-older ones.
             if (sinceUtc > DateTime.MinValue)
             {
-                await _siteQueue.MarkReconciledUpToAsync(sinceUtc, null, ct).ConfigureAwait(false);
+                await _siteQueue.MarkReconciledUpToAsync(sinceUtc, afterId, ct).ConfigureAwait(false);
             }
 
             var rows = await _siteQueue
-                .ReadPendingSinceAsync(sinceUtc, batchSize, afterId: null, ct)
+                .ReadPendingSinceAsync(sinceUtc, batchSize, afterId, ct)
                 .ConfigureAwait(false);
 
             // MoreAvailable is true iff the read filled the batch — the actor