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/vd_control.cpp

@@ -0,0 +1,143 @@
+/**
+  * @RDE_HEADER@
+  * VdControl
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Astrid Müller, SGAS, 2018-02-22
+  */
+
+#include "vd_control.h"
+#include "ivd_comm.h"
+#include "ava_types.h"
+#include "AvsCommands/simple_command.h"
+#include "AvsCommands/vd_set_script.h"
+#include "AvsCommands/keep_alive.h"
+#include <LtsUtilsCore/scoped_connection.h>
+#include <QTimer>
+#include <QtGlobal>
+#include <boost/optional.hpp>
+#include <chrono>
+
+namespace AudioVideoManagement
+{
+
+VdControl::VdControl(IVdComm *comm, std::chrono::milliseconds commandTimeout)
+  : m_comm(comm)
+  , m_queue(commandTimeout)
+  , m_logger(getLogger("VdControl"))
+{
+  Q_ASSERT(comm);
+
+  connect(comm, &IVdComm::connected, this, &VdControl::onConnected);
+  connect(comm, &IVdComm::disconnected, this, &VdControl::onDisconnected);
+  connect(&m_queue, &AvsCommandQueue::queueEmpty, this, &VdControl::commandQueueEmpty); // signal -> signal
+  connect(&m_queue, &AvsCommandQueue::timeout, this, &VdControl::onTimeout);
+}
+
+void VdControl::switchContext(int exerciseId)
+{
+  queue(new VdCommands::SimpleCommand(QLatin1String("SwitchContext"), m_comm, this, [ = ](IVdComm * comm) { comm->switchContext(exerciseId); }));
+}
+
+void VdControl::vdSetScript(const QString &scriptName, AvaStreamType typ, int fileSplitting, const QVector<AvaScriptEntry> &streams, const QString &exportedDirBaseName, const QString &absolutePath)
+{
+  vdSetScript(scriptName, typ, fileSplitting, streams, exportedDirBaseName, absolutePath, new LtsUtils::DummyConnection);
+}
+
+
+void VdControl::vdReleaseScript(const QString &scriptName)
+{
+  queue(new VdCommands::SimpleCommand(QLatin1String("vdReleaseScript"), m_comm, this, [ = ](IVdComm * comm) { comm->vdReleaseScript(scriptName); }));
+}
+
+void VdControl::keepAlive()
+{
+  queue(new VdCommands::KeepAlive(m_comm, this));
+}
+
+void VdControl::onConnected()
+{
+  m_connected = true;
+  DEBUG_LOG(m_logger) << "connected";
+}
+
+void VdControl::onDisconnected()
+{
+  m_connected = false;
+  DEBUG_LOG(m_logger) << "disconnected";
+  m_queue.flush();
+}
+
+void VdControl::onTimeout()
+{
+  ICommand *cmd = m_queue.currentCommand();
+  if (cmd->canTimeout())
+  {
+    INFO_LOG(m_logger) << "command '" << cmd->debug() << "' failed";
+    m_queue.done();
+    return;
+  }
+
+  ERROR_LOG(m_logger) << "command timed out";
+  failed(cmd);
+}
+
+void VdControl::vdSetScript(const QString &scriptName, AvaStreamType typ, int fileSplitting, const QVector<AvaScriptEntry> &streams,
+                            const QString &exportedDirBaseName, const QString &absolutePath, LtsUtils::IConnection *connection)
+{
+  queue(new AvaCommands::VdSetScript(m_comm, this, scriptName, typ, fileSplitting, streams, exportedDirBaseName, absolutePath), connection);
+}
+
+void VdControl::queue(ICommand *cmd, LtsUtils::IConnection *connection)
+{
+  Q_ASSERT(cmd);
+
+  std::unique_ptr<ICommand>   cmd_(cmd);
+  std::unique_ptr<LtsUtils::IConnection>   connection_(connection);
+
+  if (!m_connected)
+  {
+    DEBUG_LOG(m_logger) << "not connected -> dropping command";
+    return;
+  }
+
+  m_queue.queue(std::move(cmd_), std::move(connection_));
+}
+
+/**
+ * Default fallback for all commands that don't require special action
+ * upon completion such as emitting a signal.
+ */
+void VdControl::done(ICommand *cmd)
+{
+  Q_ASSERT(cmd == m_queue.currentCommand());
+  m_queue.done();
+}
+
+void VdControl::done(AvaCommands::VdSetScript *cmd)
+{
+  Q_ASSERT(cmd == m_queue.currentCommand());
+
+  {
+    LtsUtils::ScopedConnection   scopedConn(m_queue.currentConnection());
+    emit vdScriptFinished(cmd->getAvDir(), cmd->getStreamType(), cmd->wasSuccessful());
+  } // extra small scope as done() deletes the instance scopedConn is operating on
+  m_queue.done();
+}
+
+void VdControl::failed(ICommand *cmd)
+{
+  ERROR_LOG(m_logger) << "command '" << cmd->debug() << "' failed";
+  Q_ASSERT(cmd == m_queue.currentCommand());
+  m_queue.flush();
+  m_comm->forceDisconnect();
+}
+
+void VdControl::alive(ICommand *cmd)
+{
+  Q_ASSERT(cmd == m_queue.currentCommand());
+  m_queue.alive();
+}
+
+} // namespace AudioVideoManagement