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/main_handler.cpp

@@ -0,0 +1,148 @@
+/**
+  * MainHandler for ExerciseManagement
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#include "main_handler.h"
+#include <DBAdministration/exercise_table_generator.h>
+
+#include "handler_exercise.h"
+#include "handler_exercise_phase.h"
+#include "settings.h"
+
+#include <DDS/DDSConnector/dds_connector.h>
+#include <DDS/Core/pacemaker.h>
+#include <ngltools/ngltools_filesystem.h>
+
+namespace ExerciseManagement
+{
+
+MainHandler::MainHandler(QObject *parent)
+  : QObject(parent)
+  , m_logger(getLogger("MainHandler"))
+{}
+
+MainHandler::~MainHandler()
+{
+  m_handlerExercisePhases = nullptr;
+  m_handlerExercise = nullptr;
+  m_websocketHandler = nullptr;
+  m_exTblGen = nullptr;
+  m_dbHandler = nullptr;
+  m_ddsHandler = nullptr;
+}
+
+bool MainHandler::init(int domainId)
+{
+  // initialize DDS
+  m_ddsHandler = std::make_shared<DdsHandler>(domainId);
+  if (!m_ddsHandler->init())
+  {
+    ERROR_LOG(m_logger) << "Initialisation ddsHandler failed.";
+    return false;
+  }
+
+  // initialize database
+  m_dbHandler = std::make_shared<DbHandler>();
+  if (!m_dbHandler->init(0, Settings::settings()))
+  {
+    ERROR_LOG(m_logger) << "Initialisation dbHandler failed.";
+    return false;
+  }
+
+  // initialize DbAdministration
+  if (!initDbAdminstration())
+  {
+    ERROR_LOG(m_logger) << "Initialisation dbAdministration failed.";
+    return false;
+  }
+
+  //create all global schemas + tables
+  m_exTblGen->executeSql();
+
+  // read project specific data from database
+  // publish project specific data
+  // initialize the specific handler
+  if (!initExerciseHandler())
+    return false;
+
+  if (!initExercisePhaseHandler())
+    return false;
+
+  if (!initWebSocketHandler())
+    return false;
+
+  m_ddsHandler->pacemaker()->setNewState(Core::RunningState::Running);
+
+  return true;
+}
+
+bool MainHandler::initDbAdminstration()
+{
+  // xmlPath
+  const QString xmlPath = NGL::directory(NGL::FileType::ConfigFile, QLatin1String("xml"));
+  m_exTblGen = std::make_shared<DBAdministration::ExerciseTableGenerator>(getLogger("ExerciseTableGenerator"), xmlPath);
+  connect(m_exTblGen.get(), &DBAdministration::ExerciseTableGenerator::aliveSignal,
+          this, &MainHandler::sendKeepAlive);
+
+  DEBUG_LOG(m_logger) << "Initialise DbAdmin ";
+  if (!m_exTblGen->init(m_dbHandler->db()->database(),
+                   m_dbHandler->db()->schemaName()))
+  {
+    ERROR_LOG(m_logger) << "Initialisation dbAdminHandler failed.";
+    return false;
+  }
+  return true;
+}
+
+bool MainHandler::initExerciseHandler()
+{
+  m_handlerExercise.reset(new HandlerExercise(this, m_ddsHandler, m_dbHandler->db(), m_exTblGen));
+
+  DEBUG_LOG(m_logger) << "Initialise ExerciseHandler ";
+  if (!m_handlerExercise->init())
+  {
+    ERROR_LOG(m_logger) << "Initialisation ExerciseHandler failed.";
+    return false;
+  }
+
+  return true;
+}
+
+bool MainHandler::initExercisePhaseHandler()
+{
+  m_handlerExercisePhases.reset(new HandlerExercisePhase(this, m_ddsHandler, m_dbHandler->db()));
+
+  DEBUG_LOG(m_logger) << "Initialise ExercisePhaseHandler ";
+  if (!m_handlerExercisePhases->init())
+  {
+    ERROR_LOG(m_logger) << "Initialisation ExercisePhaseHandler failed.";
+    return false;
+  }
+
+  return true;
+}
+
+bool MainHandler::initWebSocketHandler()
+{
+  m_websocketHandler =  std::make_shared<WebSocketInterface::WebSocketInterfaceHandler>(this);
+  DEBUG_LOG(m_logger) << "Initialise WebSocketInterfaceHandler";
+  if (!m_websocketHandler->init())
+  {
+    ERROR_LOG(m_logger) << "Initialisation WebSocketInterfaceHandler failed.";
+    return false;
+  }
+
+  m_ddsHandler->pacemaker()->addPort(m_websocketHandler->webSocketPort(), Core::PortType::WebSocketServer);
+
+  return true;
+}
+
+void MainHandler::sendKeepAlive()
+{
+  m_ddsHandler->pacemaker()->publishState();
+}
+
+} // namespace ExerciseManagement