Close all four stability-review 2026-04-13 findings so a failed runtime probe subscription can no longer leave a phantom entry that Tick() flips to Stopped and fans out false BadOutOfService quality across a host's subtree, a silently-failed dashboard bind no longer lets the service advertise a successful start while an operator-visible endpoint is dead, the seven sync-over-async sites in LmxNodeManager (rebuild probe sync, Read, Write, four HistoryRead overrides) can no longer park the OPC UA stack thread indefinitely on a hung backend, and alarm auto-subscribe + transferred-subscription restore no longer race shutdown as untracked fire-and-forget tasks.

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

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

@@ -46,7 +46,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             SecurityProfileConfiguration? securityConfig = null,
             RedundancyConfiguration? redundancyConfig = null,
             AlarmObjectFilter? alarmObjectFilter = null,
-            MxAccessConfiguration? mxAccessConfig = null)
+            MxAccessConfiguration? mxAccessConfig = null,
+            HistorianConfiguration? historianConfig = null)
         {
             _config = config;
             _mxAccessClient = mxAccessClient;
@@ -58,9 +59,11 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
             _redundancyConfig = redundancyConfig ?? new RedundancyConfiguration();
             _alarmObjectFilter = alarmObjectFilter;
             _mxAccessConfig = mxAccessConfig ?? new MxAccessConfiguration();
+            _historianConfig = historianConfig ?? new HistorianConfiguration();
         }
 
         private readonly MxAccessConfiguration _mxAccessConfig;
+        private readonly HistorianConfiguration _historianConfig;
 
         /// <summary>
         ///     Gets the active node manager that holds the published Galaxy namespace.
@@ -245,7 +248,9 @@ namespace ZB.MOM.WW.LmxOpcUa.Host.OpcUa
                 _config.AlarmTrackingEnabled, _authConfig, _authProvider, _redundancyConfig, applicationUri,
                 _alarmObjectFilter,
                 _mxAccessConfig.RuntimeStatusProbesEnabled,
-                _mxAccessConfig.RuntimeStatusUnknownTimeoutSeconds);
+                _mxAccessConfig.RuntimeStatusUnknownTimeoutSeconds,
+                _mxAccessConfig.RequestTimeoutSeconds,
+                _historianConfig.RequestTimeoutSeconds);
             await _application.Start(_server);
 
             Log.Information(