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/Services/TargetManagement/object_target_area_assignment.h

@@ -35,8 +35,8 @@ public:
   Core::FunctionReplyObject updateObject(const TargetAreaAssignment &data);
   Core::FunctionReplyObject removeObject();
 
-  qint32 getId() const { return m_data.id(); }
-  QString getName() const { return QString::fromStdString(m_data.name()); }
+  qint32 getId() const { return m_data.id; }
+  QString getName() const { return QString::fromStdString(m_data.name); }
   const TargetAreaAssignment &getData() const { return m_data; }
 
   bool isValid() const;