Qt6 Migration: Complete migration with DDS/RTI support and build validation

Major Changes:
- Merged latest Qt5 devel content from dlbo (292 files changed, 7 new dirs)
- Consolidated forward-declarations and include folders
- Removed unneeded modules per Niklas' repo check list

Build System Fixes:
- Fixed CMake VERSION_GREATER syntax in ParticipantManagement/CMakeLists.txt
- Added VLC packages (libvlc-dev, vlc-plugin-base) to docker_build.sh
- Added PostgreSQL dev packages (libpq-dev, postgresql-server-dev-all) to Dockerfile
- Fixed locale warnings (ANSI_X3.4-1968 → C.UTF-8)
- Fixed ArcGIS SDK path warnings when BUILD_ARCGIS=OFF

Code Generation Fixes:
- Fixed IDL enum collisions (PortType→CorePortType/DdsutPortType, PdmEventType)
- Fixed Grantlee template svc_translation.cpp.grantlee:
  - Changed {{ idl_enum.name }}_def:: to {{ idl_enum.name }}::
  - Fixed .underlying() calls for C++11 scoped enums (enum class)
- Removed generated files from repo (moc_*, *_dtc.h, *_ftc.h)

Validation:
- BUILD_RTI=ON: SUCCESS
- BUILD_RTI=OFF: SUCCESS
- C++17 standard maintained for RTI 7.7 compatibility
- Ubuntu 26.04 Docker environment verified

Remaining Warnings (expected):
- BgViewer, KDChart, KDReports, Poppler-Qt6 not found (optional features)

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

qt5-before/dlbo/Lts/Proxies/CombatNetRadio/active_exercises.cpp

@@ -0,0 +1,93 @@
+/**
+  * @RDE_HEADER@
+  * ActiveExercises
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Fröbel, NLE, 2019-08-01
+  */
+
+#include "active_exercises.h"
+#include <ExerciseManagement/exm_dtc.h>
+#include <ExerciseManagement/exm.hpp>
+#include <LtsUtilsCore/data_modification_enum.h>
+#include <QtGlobal>
+
+namespace
+{
+
+bool isActive(ExerciseManagement::ExerciseState state)
+{
+  return (state == ExerciseManagement::ExerciseState::Started ||
+          state == ExerciseManagement::ExerciseState::Paused);
+}
+
+} // anonymous namespace
+
+
+namespace CombatNetRadio
+{
+
+ActiveExercises::ActiveExercises(ExerciseManagement::Interface::Dtc *exmDtc)
+  : m_exmDtc(exmDtc)
+{
+  Q_ASSERT(exmDtc);
+
+  connect(m_exmDtc, &ExerciseManagement::Interface::Dtc::exerciseChanged, this, &ActiveExercises::onExerciseChanged);
+
+  // Make sure that the topic is enabled *after* construction.
+  Q_ASSERT(!m_exmDtc->isExerciseEnabled());
+}
+
+void ActiveExercises::onExerciseChanged(const ExerciseManagement::Exercise &exercise, DataModification modType)
+{
+  switch (modType)
+  {
+  case DataModification::eAdded:
+    Q_FALLTHROUGH();
+  case DataModification::eModified:
+    check(exercise);
+    break;
+
+  case DataModification::eRemoved:
+    tryDeactivate(exercise.id());
+    break;
+  }
+}
+
+void ActiveExercises::check(const ExerciseManagement::Exercise &exercise)
+{
+  Q_ASSERT(exercise.id() > 0);
+
+  if (isActive(exercise.state()))
+    tryActivate(exercise.id());
+  else
+    tryDeactivate(exercise.id());
+}
+
+void ActiveExercises::tryActivate(int exerciseId)
+{
+  Q_ASSERT(exerciseId > 0);
+
+  auto   found = m_activeExercises.find(exerciseId);
+  if (found != m_activeExercises.end())
+    return;
+
+  m_activeExercises.insert(exerciseId);
+  emit activated(exerciseId);
+}
+
+void ActiveExercises::tryDeactivate(int exerciseId)
+{
+  Q_ASSERT(exerciseId > 0);
+
+  auto   found = m_activeExercises.find(exerciseId);
+  if (found == m_activeExercises.end())
+    return;
+
+  m_activeExercises.erase(found);
+  emit deactivated(exerciseId);
+}
+
+
+} // namespace CombatNetRadio