Complete Qt6 migration: full clean build green across groups G1-G12 incl. runtime plugin set

new_docker_build.sh gains Group 12 (212 GUI/Data plugins); fixes LtsUtilsGuiDds visibility (LTO-stripped exports), LtsProjectionWorkstation unity name shadow, 6 unity-off dirs (dup file-scope statics, ddsftc INTERFACE sources) and reconfigures BUILD_FILTERMANAGEMENT/BUILD_PLUGINS_SERVICEMONITOR=ON

qt6-after/qt6-migrated-legatus/Lts/Common/PluginInterfaces/CMakeLists.txt

@@ -51,8 +51,27 @@ ADD_LIBRARY(TopicReplayInterface SHARED
   ${CMAKE_CURRENT_SOURCE_DIR}/topic_replay_interface.h
   ${CMAKE_CURRENT_SOURCE_DIR}/topic_replay_interface.cpp
 )
-TARGET_INCLUDE_DIRECTORIES(TopicReplayInterface PUBLIC 
+TARGET_INCLUDE_DIRECTORIES(TopicReplayInterface PUBLIC
   ${CMAKE_CURRENT_SOURCE_DIR}/..
   ${CMAKE_BINARY_DIR}/Lts/Common/TopicEditorBase # topiceditorbase_export.h
 )
 TARGET_LINK_LIBRARIES(TopicReplayInterface PUBLIC Qt6::Core TopicEditorBase)
+
+# These interface base classes (e.g. DataPluginBase::Plugin) are Q_OBJECT classes. The top-level
+# CMAKE_CXX_VISIBILITY_PRESET hidden compiles their Q_OBJECT meta symbols (staticMetaObject/vtable/
+# qt_metacall/typeinfo) as GLOBAL HIDDEN, so they are not exported from the .so. A cross-DSO
+# subclass (e.g. AsbDataPlugin) then fails with "undefined reference to ...::staticMetaObject".
+# Compile these interface libs with default visibility so the meta symbols are exported to consumers
+# (the legacy build, without LTO, exported them). This only widens the export surface of these tiny
+# interface libs; it changes no runtime behaviour.
+set_target_properties(
+  DataPluginInterface
+  GuiPluginInterface
+  ProjectPluginInterface
+  StylePluginInterface
+  RecordReplayPlugin
+  TopicReplayInterface
+  PROPERTIES
+    CXX_VISIBILITY_PRESET default
+    CXX_VISIBILITY_INLINES_HIDDEN OFF
+)

qt6-after/qt6-migrated-legatus/Lts/Common/PluginInterfaces/gui_plugin_interface.h

@@ -132,12 +132,12 @@ class Interface
 
   protected:
     LtsSession::LtsSession* m_session;
+    NGL::INGLLogger& m_logger;
 
   private:
     QFlags<LtsAppDescriptor::PluginInfo::Flag> m_flags;
     QStringList m_options;
     LtsAppDescriptor::App m_appId;
-    NGL::INGLLogger& m_logger;
 };
 
 } // namespace GuiPluginBase