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/Services/ExerciseManagement/handler_exercise.h

@@ -0,0 +1,121 @@
+/**
+  * @RDE_HEADER@
+  * Handler for all exercise objects
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Hanna E. Rathje, SLSE, 2015-09-03
+  */
+#pragma once
+
+#include <QObject>
+#include <QQueue>
+#include <QHash>
+#include <QCache>
+#include <QSize>
+
+#include <DBAdministration/exercise_table_generator.h>
+#include "dds_handler.h"
+#include <ExerciseManagement/exm_db.h>
+#include "logger.h"
+
+class QTimer;
+namespace ExerciseManagement
+{
+class MainHandler;
+class ObjectExercise;
+class HandlerExercise final : public QObject
+    , protected Interface::Fts::ExerciseCreateRequestHandler
+    , protected Interface::Fts::ExerciseModifyRequestHandler
+    , protected Interface::Fts::ExerciseRemoveRequestHandler
+    , protected Interface::Fts::ExerciseImageModifyRequestHandler
+    , protected Interface::Fts::GetExerciseImageRequestHandler
+    , protected ServiceManagement::Interface::Ftc::StartGroupReplyHandler
+{
+  Q_OBJECT
+public:
+  explicit HandlerExercise(MainHandler *mainHandler,
+                           const std::shared_ptr<DdsHandler> &ddsHandler,
+                           const std::shared_ptr<DatabaseInterface> &db,
+                           const std::shared_ptr<DBAdministration::ExerciseTableGenerator> &exTableGenerator,
+                           QObject *parent = nullptr);
+  ~HandlerExercise();
+
+  bool init();
+  ObjectExercise *getExerciseById(qint32 id) const;
+  const QHash<int, ObjectExercise*> &getExerciseMap() const { return m_exeObjMap; }
+
+  bool startGroupRequest(const ServiceManagement::GroupRequest &req);
+
+
+//  class ImageKey
+//  {
+//  public:
+//    ImageKey(const QSize &size = QSize(0, 0), bool lowBandwith = false)
+//      : m_lowBandwidth(lowBandwith)
+//      , m_size(size)
+//    {}
+//    bool m_lowBandwidth { false };
+//    QSize m_size;
+
+//    bool operator<(const ImageKey &o) const
+//    {
+//      if (m_size.height() != o.m_size.height())
+//        return m_size.height() < o.m_size.height();
+//      if (m_size.width() != o.m_size.width())
+//        return m_size.width() < o.m_size.width();
+//      return m_lowBandwidth < o.m_lowBandwidth;
+//    }
+
+//    bool operator==(const ImageKey &o) const
+//    {
+//      return (m_size == o.m_size && m_lowBandwidth == o.m_lowBandwidth);
+//    }
+//  };
+private:
+  void onStartNextExercise();
+private:
+  /**
+   * @brief HandlerExercise::hasError
+   *        checks if there is an error in the replyObject and, if given, deletes
+   *        the ifs pointer and logs the error
+   * @param replyObject
+   * @param ifs
+   * @return
+   */
+  bool hasError(const Core::FunctionReplyObject &replyObject, ObjectExercise *ifs) const;
+
+  void onExerciseCreateRequest(const rti::core::SampleIdentity &cookie,
+                               const ExerciseCreateRequest &request) override final;
+  Core::FunctionReplyObject exerciseCreateRequest(const ExerciseCreateRequest &request);
+  void onExerciseModifyRequest(const rti::core::SampleIdentity &cookie,
+                               const ExerciseModifyRequest &request) override final;
+  Core::FunctionReplyObject exerciseModifyRequest(const ExerciseModifyRequest &request);
+//  void onExerciseChangeStateRequest(const rti::core::SampleIdentity &cookie,
+//                                    const ExerciseChangeStateRequest &request) override final;
+  void onExerciseRemoveRequest(const rti::core::SampleIdentity &cookie,
+                               const ExerciseRemoveRequest &request) override final;
+  void onExerciseImageModifyRequest(const rti::core::SampleIdentity &cookie,
+                                    const ExerciseImageModifyRequest &request) override final;
+  void onGetExerciseImageRequest(const rti::core::SampleIdentity &cookie,
+                                 const GetExerciseImageRequest &request) override final;
+
+  void onStartGroupReply(const Core::FunctionReplyObject &replyObject) override final;
+
+  bool checkEquipmentNumbersOnAllExercises(int exerciseIdToBeStarted, QString &mesgOut);
+
+  QStringList doubleChannels(int exerciseAId, int exerciseBId) const;
+
+private:
+  QHash<int, ObjectExercise*>       m_exeObjMap;
+  MainHandler                      *m_mainHandler;
+  std::shared_ptr<DdsHandler>       m_ddsHandler;
+  std::shared_ptr<DatabaseInterface>m_db;
+  std::shared_ptr<DBAdministration::ExerciseTableGenerator> m_exTblGen;
+  QTimer                           *m_startupExerciseTimer;
+  QQueue<int>                       m_exercisesToStart;
+  //QCache<ImageKey, QByteArray>      m_imageCache;
+  NGL::INGLLogger                  &m_logger;
+
+};
+}