fix(auditlog): assert Forwarded state in push integration test; tidy docs and Host wiring

tests/ScadaLink.IntegrationTests/AuditLog/SiteAuditPushFlowTests.cs

@@ -185,9 +185,12 @@ public class SiteAuditPushFlowTests : TestKit
             // Central received and persisted the row.
             Assert.Contains(centralRepo.Rows, r => r.EventId == eventId);
 
-            // The site row is no longer Pending.
-            var stillPending = await writer.ReadPendingAsync(256, CancellationToken.None);
-            Assert.DoesNotContain(stillPending, r => r.EventId == eventId);
+            // The site row reached AuditForwardState.Forwarded specifically —
+            // not merely "no longer Pending" (a Reconciled row would also leave
+            // ReadPendingAsync, so we assert the positive Forwarded state).
+            var forwarded = await writer.ReadForwardedAsync(256, CancellationToken.None);
+            var row = Assert.Single(forwarded, r => r.EventId == eventId);
+            Assert.Equal(AuditForwardState.Forwarded, row.ForwardState);
         }, TimeSpan.FromSeconds(10), TimeSpan.FromMilliseconds(250));
 
         // The central-persisted row carries the central-stamped IngestedAtUtc.