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/ExerciseEventManagement/web_socket_avs.h

@@ -0,0 +1,110 @@
+/**
+  * WebSocket connection to AVS to retrieve AVS events
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2017-02-06
+  */
+
+#pragma once
+
+#include <QAbstractSocket>
+#include <QTimer>
+#include <QVector>
+#include <QSharedPointer>
+#include "logger.h"
+
+#include "dds_handler.h"
+#include "eem_db.h"
+#include <ngldb/db_service_handler.h>
+
+#include <ExerciseEventManagement/eem.hpp>
+
+#include <ProjectDataManagement/pdm_enums.hpp>
+#include <AudioVideoManagement/avm_dtc.h>
+#include <InfrastructureManagement/ism_dtc.h>
+
+class QWebSocket;
+namespace ExerciseEventManagement
+{
+class MainHandler;
+class WebSocketEventServer;
+
+using DbHandler = NGLDB::DbServiceHandler<DatabaseInterface>;
+struct AvsData
+{
+  int id;
+  qint64 eventTime;
+  qint64 endTime;
+  ProjectDataManagement::EventType eventType;
+  QString streamName;
+  int mainStructureElementId;
+  QSharedPointer<QTimer> timer; // no plain ptr here since AvsData is copied
+  AvsData()
+    : id(0)
+    , eventTime(0)
+    , endTime(-1)
+    , eventType(ProjectDataManagement::EventType::Unknown)
+    , mainStructureElementId(0)
+    , timer(new QTimer)
+  {
+    timer->setSingleShot(true);
+    timer->setInterval(3000);
+  }
+};
+
+class WebSocketAvs : public QObject
+{
+  Q_OBJECT
+public:
+  WebSocketAvs(MainHandler *mainHandler,
+               const std::shared_ptr<DdsHandler> &ddsHandler,
+               const std::shared_ptr<DbHandler> &db,
+               const std::shared_ptr<WebSocketEventServer> &eventServer,
+               const std::shared_ptr<AudioVideoManagement::Interface::Dtc> &avmDtc,
+               const std::shared_ptr<InfrastructureManagement::Interface::Dtc> &ismDtc,
+               int exerciseId,
+               QObject *parent = nullptr);
+  ~WebSocketAvs();
+
+  void setWsUrl(const QString &url);
+  void init();
+
+private Q_SLOTS:
+  void onTextMessageReceived(const QString &message);
+  void handleAvsData(const AvsData &data, const bool &lastRangeClosed);
+  int publishData(const QString &streamName);
+  void openWebSocket();
+  void closeWebSocket();
+  void onWebSocketError(QAbstractSocket::SocketError error);
+  void onWebSocketConnected();
+  void onWebSocketDisconnected();
+  void onSendExerciseId();
+
+  void onCleanUpDbInternal();
+  QMap<QString, QVector<AvsData>> getAllAvsData();
+  QMap<QString, QVector<AvsData>> getAllInternalDbData();
+
+private:
+  AvsData jsonObjectToAvsData(const QJsonObject &obj);
+  Database::EemEvent avsDataToEemEvent(const AvsData &data);
+  ExerciseEventManagement::Event avsDataToEvent(const AvsData &data);
+
+private:
+  std::shared_ptr<DdsHandler> m_ddsHandler;                ///< Pointer to DDS handler
+  std::shared_ptr<DbHandler>  m_dbHandler;
+  std::shared_ptr<WebSocketEventServer> m_eventServer;
+  std::shared_ptr<AudioVideoManagement::Interface::Dtc>     m_avmDtc;
+  std::shared_ptr<InfrastructureManagement::Interface::Dtc> m_ismDtc;
+  MainHandler *m_mainHandler;
+  QWebSocket *m_wsSocket;
+  QTimer *m_wsReconnectTimer;
+  QTimer *m_cleanupTimer;
+  QString m_wsUrl;
+  QMap<QString, AvsData> m_avsDataMap;
+  int m_exerciseId;
+  qint64 m_lastUpdate;
+  bool m_bWebSocketDisconnectedWarnedOnce;
+  LOGGER_T m_logger;
+};
+} // namespace ExerciseEventManagement