Track Galaxy Platform and AppEngine runtime state via ScanState probes and proactively invalidate descendant variable quality on Stopped transitions so operators can detect a stopped runtime host before downstream clients read stale data and so the bridge delivers a uniform bad-quality signal instead of relying on MxAccess per-tag fan-out

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.LmxOpcUa.Host/OpcUa/OpcUaServerHost.cs

@@ -45,7 +45,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             IUserAuthenticationProvider? authProvider = null,
             SecurityProfileConfiguration? securityConfig = null,
             RedundancyConfiguration? redundancyConfig = null,
-            AlarmObjectFilter? alarmObjectFilter = null)
+            AlarmObjectFilter? alarmObjectFilter = null,
+            MxAccessConfiguration? mxAccessConfig = null)
         {
             _config = config;
             _mxAccessClient = mxAccessClient;
@@ -56,8 +57,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             _securityConfig = securityConfig ?? new SecurityProfileConfiguration();
             _redundancyConfig = redundancyConfig ?? new RedundancyConfiguration();
             _alarmObjectFilter = alarmObjectFilter;
+            _mxAccessConfig = mxAccessConfig ?? new MxAccessConfiguration();
         }
 
+        private readonly MxAccessConfiguration _mxAccessConfig;
+
         /// <summary>
         ///     Gets the active node manager that holds the published Galaxy namespace.
         /// </summary>
@@ -239,7 +243,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
 
             _server = new LmxOpcUaServer(_config.GalaxyName, _mxAccessClient, _metrics, _historianDataSource,
                 _config.AlarmTrackingEnabled, _authConfig, _authProvider, _redundancyConfig, applicationUri,
-                _alarmObjectFilter);
+                _alarmObjectFilter,
+                _mxAccessConfig.RuntimeStatusProbesEnabled,
+                _mxAccessConfig.RuntimeStatusUnknownTimeoutSeconds);
             await _application.Start(_server);
 
             Log.Information(