Qt6 Migration: BUILD_RTI guards und CMake fixes

- BUILD_RTI conditional compilation für RTI Connext DDS dependencies
- Namespace fixes in core_dtc.h (Core:: → DDS::Core::)
- CMakeLists.txt: BUILD_RTI option und conditional dependencies
- Handler minelayer: namespace closing mit BUILD_RTI guard
- Build erfolgreich mit BUILD_RTI=OFF validiert

Signed-off-by: Torsten Wierschin <torsten.wierschin@life-maps.com>

qt6-after/qt6-migrated-legatus/Lts/Common/LtsWebSocket/lts_web_socket_client.cpp

@@ -37,6 +37,7 @@ class WebSocketHelper : public QObject
     AbstractClientMessageFactory* m_messageFactory;
     LtsWebSocketClient* m_webSocketClient;
     QWebSocket* m_socket;
+    NGL::INGLLogger& m_logger;
 };
 
 WebSocketHelper::WebSocketHelper(AbstractClientMessageFactory* messageFactory, LtsWebSocketClient* webSocketClient,
@@ -138,7 +139,8 @@ void WebSocketHelper::parseMessage(const QString& message)
 }
 
 LtsWebSocketClient::LtsWebSocketClient(AbstractClientMessageFactory* messageFactory, QObject* parent)
-    : QObject(parent), m_messageFactory(messageFactory), m_webSocketHelperThread(new QThread(this))
+    : QObject(parent), m_logger(getLogger("LtsWebSocketClient")), m_messageFactory(messageFactory),
+      m_webSocketHelperThread(new QThread(this))
 {
     m_webSocketHelper = new WebSocketHelper(m_messageFactory, this, m_logger);
     m_webSocketHelper->moveToThread(m_webSocketHelperThread);