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/Proxies/TrainingAreaBaseOC/dds_handler.cpp

@@ -0,0 +1,68 @@
+/**
+  * DdsHandler for DDS
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Philipp Dassow, NLST, 2018-01-23
+  */
+
+#include "dds_handler.h"
+
+#include <DDS/Core/pacemaker.h>
+
+namespace TrainingAreaBaseOC
+{
+
+DdsHandler::DdsHandler(int domainId, int exerciseId)
+  : m_ddsConnector(new DDSConnector::DdsConnector(domainId, IDL::PartitionType::Exercise, exerciseId))
+  , m_logger(getLogger("DdsHandler"))
+{
+  DEBUG_LOG(m_logger) << "DdsHandler(" << domainId << ") for partition: " << m_ddsConnector->getDefaultPartition();
+}
+
+bool DdsHandler::init(const QStringList &qosFileList)
+{
+  if (!m_ddsConnector->init(qosFileList))
+  {
+    ERROR_LOG(m_logger) << "Error initializing dds connections - aborting";
+    return false;
+  }
+
+  // default initialize Publisher and Subscriber
+  m_ddsConnector->initPublisherSubscriber();
+
+  m_dtcCore = Core::Interface::Dtc::create(m_ddsConnector);
+  bool bRet = m_dtcCore->enablePartitionTime();
+
+  // Pacemaker
+  m_pacemaker = std::make_shared<Core::Pacemaker>(m_ddsConnector);
+
+  m_dtsTaboc = Interface::Dts::create(m_ddsConnector);
+  bRet &= m_dtsTaboc->enableAll();
+  INFO_LOG(m_logger) << "Dts TrainingAreaBaseOc initialised";
+
+  m_dtcTaboc = Interface::Dtc::create(m_ddsConnector);
+  bRet &= m_dtsTaboc->enableSpecificsEquipment();
+  INFO_LOG(m_logger) << "Dtc TrainingAreaBaseOc initialised";
+
+  m_ftsTaboc = Interface::Fts::create(m_ddsConnector);
+  bRet &= m_ftsTaboc->enableAll();
+  INFO_LOG(m_logger) << "Fts TrainingAreaBaseOc initialised";
+
+  m_dtsTab = TrainingAreaBase::Interface::Dts::create(m_ddsConnector);
+  bRet &= (m_dtsTab->enableOcData() && m_dtsTab->enableFireSmokeMarkerData());
+  INFO_LOG(m_logger) << "Dts TrainingAreaBase initialised";
+
+  m_ftsTab = TrainingAreaBase::Interface::Fts::create(m_ddsConnector);
+  bRet &= (m_ftsTab->enableSendOcData() && m_ftsTab->enableSendFireSmokeMarkerData());
+  INFO_LOG(m_logger) << "Fts TrainingAreaBase initialised";
+
+  return bRet;
+}
+
+qint64 DdsHandler::currentPartitionTime() const
+{
+  return m_dtcCore->partitionTime().timeStamp();
+}
+
+} // Namespace PDM