Fix infinite recursion for subapp through connections in monitoring

Fix infinite recursion for subapp through connections in monitoring by
only considering connections from input to input and output to output
when recursively resolving subapp interface connections.

plugins/org.eclipse.fordiac.ide.deployment.debug/src/org/eclipse/fordiac/ide/deployment/debug/watch/DeploymentDebugWatchUtils.java

@@ -12,6 +12,7 @@
  *******************************************************************************/
 package org.eclipse.fordiac.ide.deployment.debug.watch;
 
+import java.util.function.Predicate;
 import java.util.stream.Stream;
 
 import org.eclipse.fordiac.ide.model.libraryElement.AdapterDeclaration;
@@ -73,9 +74,11 @@ public static <T extends IInterfaceElement> Stream<T> resolveSubappInterfaceConn
 			subapp.loadSubAppNetwork(); // ensure network is loaded
 			if (element.isIsInput()) {
 				yield (Stream<T>) element.getOutputConnections().stream().map(Connection::getDestination)
+						.filter(IInterfaceElement::isIsInput) // skip inner connections to output
 						.flatMap(DeploymentDebugWatchUtils::resolveSubappInterfaceConnections);
 			}
 			yield (Stream<T>) element.getInputConnections().stream().map(Connection::getSource)
+					.filter(Predicate.not(IInterfaceElement::isIsInput)) // skip inner connections to input
 					.flatMap(DeploymentDebugWatchUtils::resolveSubappInterfaceConnections);
 		}
 		case final AdapterFB adapterFB -> (Stream<T>) resolveSubappInterfaceConnections(adapterFB.getAdapterDecl())