LtsSession: STUB-Unterstützung und Build-Fixes

- lts_session_data_dds.h/cpp: BUILD_RTI guards für STUB/Real-Implementation
- Include-Pfad fix: DDS/QosProfile/DDS_DefaultQos (ohne .h)
- CMakeLists.txt: qtservice_export.h Includer Pfad korrigiert
- AdvancedSymbology/Data: Qt6 Core5Compat Verlinkung

RTI License: ~/swy/sandbox/rti_license.dat (leer, vom Installer)
ArcGIS SDK: ./external/ArcGIS/MapsSDK_Qt_300.0.0/

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/Lts/Common/LtsSession/lts_session.cpp

@@ -1122,14 +1122,6 @@ bool LtsSession::event(QEvent* e)
 
     return LtsSessionDataDds::event(e);
 }
-#else
-bool LtsSession::event(QEvent* e)
-{
-    if (e->type() == QEvent::LanguageChange)
-        m_baseLayout->setAppName(appToString(app()));
-
-    return QObject::event(e);
-}
 #endif // BUILD_RTI
 
 #ifdef BUILD_RTI