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/ExerciseManagement/object_exercise.cpp

@@ -293,7 +293,7 @@ Core::FunctionReplyObject ObjectExercise::switchToState(const ExerciseState &new
   bool ok = m_stateMachine->switchToState(newExerciseState);
   if (!ok)
   {
-    ret = Core::FunctionReplyObject(m_data.id, tr_lts("dds", "Error switching to state %1")).arg(newExerciseState.underlying());
+    ret = Core::FunctionReplyObject(m_data.id, tr_lts("dds", "Error switching to state %1")).arg(static_cast<int>(newExerciseState));
   }
   NOTICE_LOG(m_logger) << "-------------- after switch: currentState" << m_stateMachine->getCurrentState();
   NOTICE_LOG(m_logger) << "-> OperatorId: " << m_data.operatorId << ", workstationId: " << m_data.workstationId;
@@ -304,7 +304,7 @@ static int s_requestId = 0;
 bool ObjectExercise::sendStateToServiceManagement(ExerciseState state)
 {
   Core::ServiceGroupType sgt = Core::ServiceGroupType::Core;  // invalid here
-  switch (state.underlying())
+  switch (state)
   {
   case ExerciseState::Created:
     sgt = Core::ServiceGroupType::ExercisePreparation;