BUILD_RTI guards: svcTabCommon export header + GuezMinelayerProcessing stubs

- TrainingAreaBase/CMakeLists.txt: Wrap RTIDDSGEN with BUILD_RTI, add fallback target
- GuezMinelayerProcessing: BUILD_RTI guards for HandlerMinelayerData + stubs
- ddsfts/CMakeLists.txt: Fix INTERFACE→PUBLIC, add svcTabCommon dependency
- Add stub headers for BUILD_RTI=OFF compilation

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

qt6-after/qt6-migrated-legatus/Lts/Services/GuezMinelayerProcessing/dds_handler.h

@@ -29,15 +29,15 @@ public:
 
 #if BUILD_RTI
   std::shared_ptr<DDSConnector::DdsConnector> ddsConnector() const { return m_ddsConnector; }
-#endif
   std::shared_ptr<Core::TopicLockMaster> topicLockMaster() const { return m_topicLockMaster; }
+#endif
 
 private:
   NGL::INGLLogger &m_logger;
 #if BUILD_RTI
   std::shared_ptr<DDSConnector::DdsConnector>       m_ddsConnector;
-#endif
   std::shared_ptr<Core::TopicLockMaster>            m_topicLockMaster;
+#endif
 };
 
 }