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/OcSituationServer/handler_oc_data.h

@@ -0,0 +1,91 @@
+/**
+  * Handler for all oc data at the server
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Philipp Dassow, NLST, 14-02-2018
+  */
+#pragma once
+
+#include "main_handler.h"
+#include "logger.h"
+
+#include <QMap>
+#include <QMutex>
+#include <QTimer>
+
+namespace OcSituationServer
+{
+class ThreadOcCentralAesData;
+class ThreadOcSituationData;
+class HandlerOcAesData;
+class HandlerOcData : public QObject
+  , protected Interface::Fts::SendEquipmentMessageOcRequestHandler
+  , protected Interface::Fts::EquipmentErrorRequestHandler
+  , protected Evaluations::Interface::Ftc::EvlCommentModifyReplyHandler
+  , protected Messaging::Interface::Ftc::CreateOperatorMessageReplyHandler
+  , protected ParticipantManagement::Interface::Ftc::RegisterParticipantReplyHandler
+  , protected TrainingAreaBase::Interface::Ftc::SendOcDataReplyHandler
+{
+  Q_OBJECT
+public:
+  explicit HandlerOcData(MainHandler *mainHandler,
+                         QObject *parent = nullptr);
+
+  ~HandlerOcData();
+
+  bool init();
+
+protected:
+  void onEvlCommentModifyReply(const Core::FunctionReplyObject &reply) override final;
+  void onCreateOperatorMessageReply(const Core::FunctionReplyObject &reply) override final;
+  void onSendOcDataReply(const Core::FunctionReplyObject &reply) override final;
+  void onRegisterParticipantReply(const ParticipantManagement::RegisterReply &reply) override final;
+
+private slots:
+  void onEvaluationSchemaChanged(const Evaluations::EvaluationSchema &data, DataModification modType);
+  void onOcDataChanged(const TrainingAreaBase::OcData &data, DataModification modType);
+  void onSendOcData(const TrainingAreaBase::SendOcDataRequest &req);
+  void sendStateInformation();
+  void onSituationThreadExit();
+  void onCentralAesThreadExit();
+
+private:
+  void onSendEquipmentMessageOcRequest(const rti::core::SampleIdentity &cookie,
+                                       const SendEquipmentMessageRequest &request) override final;
+  void onEquipmentErrorRequest(const rti::core::SampleIdentity &cookie,
+                               const EquipmentErrorRequest &request) override final;
+
+  void handleDemandSituation(const QByteArray &data, int equipmentId);
+  void handleDemandEvaluationSchema(const QByteArray &data, int equipmentNumber);
+  void handleEvaluation(const QByteArray &data);
+  void handleMessage(const QByteArray &data);
+  void handleEquipmentErrorRegistration(const QByteArray &data);
+  void handleEquipmentRegistration(const QByteArray &data);
+
+
+  MainHandler      *m_mainHandler;
+  HandlerOcAesData *m_handlerOcAesData;
+
+  std::shared_ptr<Interface::Dts> m_dts;
+  std::shared_ptr<Interface::Fts> m_fts;
+
+  std::shared_ptr<Evaluations::Interface::Dtc>           m_evlDtc;
+  std::shared_ptr<Evaluations::Interface::Ftc>           m_evlFtc;
+  std::shared_ptr<Messaging::Interface::Ftc>             m_msgFtc;
+  std::shared_ptr<ParticipantManagement::Interface::Dtc> m_ppmDtc;
+  std::shared_ptr<ParticipantManagement::Interface::Ftc> m_ppmFtc;
+
+  std::shared_ptr<TrainingAreaBase::Interface::Dtc>      m_tabDtc;
+  std::shared_ptr<TrainingAreaBase::Interface::Ftc>      m_tabFtc;
+
+  int m_currentActiveEvaluationSchemaId;
+  QMap<int, ThreadOcSituationData *> m_situationThreads; // equipmentId, thread for situation data handling
+  QMap<int, ThreadOcCentralAesData *> m_centralAesDataThreads; // equipmentId, thread for central aes data handling
+  QMutex  m_accessMutex; // Mutex-Object
+  QTimer *m_stateInformationTimer;
+
+  NGL::INGLLogger &m_logger;
+
+};
+}