Auto: ablegacy-12 — auto-demote on comm failure

Closes #255

src/ZB.MOM.WW.OtOpcUa.Server/HostStatusPublisher.cs

@@ -138,6 +138,11 @@ public sealed class HostStatusPublisher(
         HostState.Running => DriverHostState.Running,
         HostState.Stopped => DriverHostState.Stopped,
         HostState.Faulted => DriverHostState.Faulted,
+        // PR ablegacy-12 / #255 — Demoted is a driver-side back-off (skipped reads while
+        // we wait for a flaky host to recover). The Configuration enum doesn't have a
+        // dedicated value; surface it as Stopped so the Admin UI lights it up red-ish
+        // without the publisher needing a schema migration to differentiate.
+        HostState.Demoted => DriverHostState.Stopped,
         _ => DriverHostState.Unknown,
     };
 }