fix(dcl): feed ScadaBridge:MxGateway:ClientNamePrefix into the MxGateway client-name fallback (review 2026-10-21 02/U1, 08/O2)

src/ZB.MOM.WW.ScadaBridge.DataConnectionLayer/DataConnectionFactory.cs

@@ -35,11 +35,13 @@ public class DataConnectionFactory : IDataConnectionFactory
     /// construction without it keeps literal-key behaviour.
     /// </param>
     /// <param name="dataConnectionOptions">Optional data connection options, such as the MxGateway supervisory-advise parallelism; defaults apply when null.</param>
+    /// <param name="mxGatewayGlobalOptions">Optional MxGateway global options (the client-name fallback); defaults apply when null.</param>
     public DataConnectionFactory(
         ILoggerFactory loggerFactory,
         IOptions<OpcUaGlobalOptions> opcUaGlobalOptions,
         ISecretResolver? secretResolver = null,
-        IOptions<DataConnectionOptions>? dataConnectionOptions = null)
+        IOptions<DataConnectionOptions>? dataConnectionOptions = null,
+        IOptions<MxGatewayGlobalOptions>? mxGatewayGlobalOptions = null)
     {
         _loggerFactory = loggerFactory;
         _secretResolver = secretResolver;
@@ -48,6 +50,9 @@ public class DataConnectionFactory : IDataConnectionFactory
         // DataConnectionOptions is consumed by the actor, which is constructed elsewhere.
         var supervisoryAdviseParallelism =
             (dataConnectionOptions?.Value ?? new DataConnectionOptions()).MxSupervisoryAdviseParallelism;
+        // The client registration name a connection with a blank ClientName falls back to
+        // (review 2026-10-21 02/U1 — the option was bound and validated but never read).
+        var mxClientNamePrefix = (mxGatewayGlobalOptions?.Value ?? new MxGatewayGlobalOptions()).ClientNamePrefix;
 
         // Register built-in protocols.
         // Pass the ILoggerFactory into RealOpcUaClientFactory so
@@ -64,7 +69,8 @@ public class DataConnectionFactory : IDataConnectionFactory
             new RealMxGatewayClientFactory(_loggerFactory),
             _loggerFactory.CreateLogger<MxGatewayDataConnection>(),
             _secretResolver,
-            supervisoryAdviseParallelism));
+            supervisoryAdviseParallelism,
+            mxClientNamePrefix));
     }
 
     /// <summary>