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/Messaging/exercise_handler.cpp

@@ -0,0 +1,83 @@
+/**
+  * Send a function topic to TrainingAreabase in a specific exercise
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Christian Ehrlicher, SLSE, 2016-12-13
+  */
+
+
+#include "exercise_handler.h"
+
+namespace Messaging
+{
+
+ExerciseHandler::ExerciseHandler(const std::shared_ptr<DDSConnector::DdsConnector> &ddsConnector, const int exerciseId)
+  : m_ddsConnector(std::make_shared<DDSConnector::DdsConnector>(ddsConnector->getDomainId(), IDL::PartitionType::Exercise, exerciseId))
+  , m_exerciseId(exerciseId)
+  , m_idleTimer(new QTimer(this))
+  , m_logger(getLogger("ExerciseHandler"))
+{
+  connect(m_idleTimer, &QTimer::timeout,
+          this, &ExerciseHandler::exerciseHandlerIdleTimeout);
+  m_idleTimer->setSingleShot(true);
+  m_idleTimer->setInterval(60 * 60 * 1000);  // 1h
+}
+
+bool ExerciseHandler::init()
+{
+  m_ddsConnector->initPublisherSubscriber();
+  DEBUG_LOG(m_logger) << "ExerciseHandler::init m_ddsConnector=" << m_ddsConnector
+                      << " m_exerciseId=" << m_exerciseId;
+  m_tabFtc = TrainingAreaBase::Interface::Ftc::create(m_ddsConnector);
+  bool retVal = m_tabFtc->enableSendEquipmentMessage();
+  if (!retVal)
+    return false;
+
+  m_ossFtc = OcSituationServer::Interface::Ftc::create(m_ddsConnector);
+  retVal = m_ossFtc->enableSendEquipmentMessageOc();
+
+  return retVal;
+}
+
+bool ExerciseHandler::sendEquipmentMessage(const TrainingAreaBase::SendEquipmentMessageRequest &request)
+{
+  if (!m_tabFtc)
+    return false;
+  DEBUG_LOG(m_logger) << "ExerciseHandler::sendEquipmentMessage: " << request;
+  m_idleTimer->stop();
+  return m_tabFtc->sendEquipmentMessageRequest(request, this);
+}
+
+bool ExerciseHandler::sendOcEquipmentMessage(const OcSituationServer::SendEquipmentMessageRequest &request)
+{
+  if (!m_ossFtc)
+    return false;
+  DEBUG_LOG(m_logger) << "ExerciseHandler::sendOcEquipmentMessage: "<< request;
+  m_idleTimer->stop();
+  return m_ossFtc->sendEquipmentMessageOcRequest(request, this);
+}
+
+int ExerciseHandler::exerciseId() const
+{
+  return m_exerciseId;
+}
+
+void ExerciseHandler::onSendEquipmentMessageReply(const Core::FunctionReplyObject &replyObject)
+{
+  DEBUG_LOG(m_logger)<<"ExerciseHandler::onSendEquipmentMessageReply";
+  m_idleTimer->start();
+  if (replyObject.error())
+    ERROR_LOG(m_logger) << replyObject();
+  emit equipmentMessageReply(replyObject.id(), !replyObject.error());
+}
+
+void ExerciseHandler::onSendEquipmentMessageOcReply(const Core::FunctionReplyObject &replyObject)
+{
+  DEBUG_LOG(m_logger)<<"ExerciseHandler::onSendEquipmentMessageOcReply";
+  m_idleTimer->start();
+  if (replyObject.error())
+    ERROR_LOG(m_logger) << replyObject();
+  emit equipmentMessageOcReply(replyObject.id(), !replyObject.error());
+}
+} // namespace Messaging