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

src/ZB.MOM.WW.ScadaBridge.Communication/Grpc/CentralControlDtoMapper.cs

@@ -695,6 +695,7 @@ public static class CentralControlDtoMapper
             NodeHostname = msg.NodeHostname,
             IsActive = msg.IsActive,
             Timestamp = Timestamp.FromDateTimeOffset(msg.Timestamp),
+            Synthetic = msg.Synthetic,
         };
     }
 
@@ -709,7 +710,8 @@ public static class CentralControlDtoMapper
             SiteId: dto.SiteId,
             NodeHostname: dto.NodeHostname,
             IsActive: dto.IsActive,
-            Timestamp: dto.Timestamp.ToDateTimeOffset());
+            Timestamp: dto.Timestamp.ToDateTimeOffset(),
+            Synthetic: dto.Synthetic);
     }
 
     /// <summary>Projects a <see cref="ConnectionHealth"/> onto its wire enum.</summary>