fix(data-connection-layer): resolve DataConnectionLayer-014..017 — real logger for OPC UA client, initial-connect failover, accurate subscribe response, per-tag write-batch results

src/ScadaLink.DataConnectionLayer/DataConnectionFactory.cs

@@ -22,9 +22,12 @@ public class DataConnectionFactory : IDataConnectionFactory
         _loggerFactory = loggerFactory;
         var globalOptions = opcUaGlobalOptions.Value;
 
-        // Register built-in protocols
+        // Register built-in protocols.
+        // DataConnectionLayer-014: pass the ILoggerFactory into RealOpcUaClientFactory so
+        // the RealOpcUaClient it builds gets a real logger — without it the DCL-012
+        // auto-accept-certificate security warning is silently discarded by NullLogger.
         RegisterAdapter("OpcUa", details => new OpcUaDataConnection(
-            new RealOpcUaClientFactory(globalOptions),
+            new RealOpcUaClientFactory(globalOptions, _loggerFactory),
             _loggerFactory.CreateLogger<OpcUaDataConnection>()));
     }