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/AudioVideoManagement/dds_handler.cpp

@@ -0,0 +1,83 @@
+/**
+  * DdsHandler for DDS
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Hanna E. Rathje, SLSE, 2015-09-02
+  */
+
+#include "dds_handler.h"
+
+#include "avm_dts.h"
+#include "avm_fts.h"
+
+#include <AssetManagement/asm_dtc.h>
+#include <ExerciseManagement/exm_dtc.h>
+#include <AudioVideoManagement/avm_dts.h>
+#include <AudioVideoManagement/avm_fts.h>
+#include <InfrastructureManagement/ism_dtc.h>
+
+#include <DDS/DDSConnector/dds_connector.h>
+#include <DDS/Core/pacemaker.h>
+
+
+namespace AudioVideoManagement
+{
+
+DdsHandler::DdsHandler(int domainId)
+  : m_ddsConnector(std::make_shared<DDSConnector::DdsConnector>(domainId, IDL::PartitionType::Any))
+  , 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();
+  // no batched writer possible until frequency set data is no longer that big (currently 1800rows)
+  //m_ddsConnector->enableBatchedWriter(true);
+
+  // Pacemaker
+  m_pacemaker = std::make_shared<Core::Pacemaker>(m_ddsConnector);
+  m_topicLockMaster = std::make_shared<Core::TopicLockMaster>(m_ddsConnector);
+
+  m_dts = Interface::Dts::create(m_ddsConnector);
+  m_fts = Interface::Fts::create(m_ddsConnector);
+  m_exmDtc = ExerciseManagement::Interface::Dtc::create(m_ddsConnector);
+  m_ismDtc = InfrastructureManagement::Interface::Dtc::create(m_ddsConnector);
+  m_asmDtc = AssetManagement::Interface::Dtc::create(m_ddsConnector);
+
+  bool bRet = m_dts->enableAll();
+  bRet &= m_fts->enableAll();
+
+  return bRet;
+}
+
+bool DdsHandler::enableDtcClients()
+{
+  Q_ASSERT(m_exmDtc);
+  Q_ASSERT(m_ismDtc);
+  Q_ASSERT(m_asmDtc);
+  bool   status = m_exmDtc->enableExercise() &&
+                  m_ismDtc->enableInstrumentationAsset() &&
+                  m_ismDtc->enableMainStructureElement() &&
+                  m_ismDtc->enableMountingPointAsset() &&
+                  m_asmDtc->enableAsset();
+  Q_ASSERT(status);
+
+  return status;
+}
+
+dds::domain::DomainParticipant DdsHandler::domainParticipant() const
+{
+  return m_ddsConnector->getDomainParticipant();
+}
+
+} // Namespace AudioVideoManagement