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/Tools/DBUpdate/db_update.h

@@ -0,0 +1,117 @@
+/**
+  * @RDE_HEADER@
+  * DBUpdate
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Iuliana Ojog, 2021-02-17
+  */
+
+#pragma once
+
+#include <QMainWindow>
+#include <QStandardItemModel>
+#include <QVector>
+#include <QSqlDatabase>
+#include <QProcess>
+
+#include "logger.h"
+#include "global_updates_model.h"
+#include "exercises_model.h"
+#include "show_history.h"
+
+namespace Ui {
+class DBUpdate;
+}
+
+namespace DBUpdate
+{
+struct Update
+{
+  QString filename;
+  QString info;
+  QString project;
+  QString version;
+  QString date;
+  QString global_schemas;
+  QString exercise_schemas;
+  QString global_sql;
+  QString exercise_sql;
+  QString generated_sql;
+  QString generated_file;
+};
+
+class DBUpdate : public QMainWindow
+{
+  friend class DBUpdateRun;
+  Q_OBJECT
+public:
+  explicit DBUpdate(QWidget *parent = nullptr);
+  ~DBUpdate();
+  bool init();
+private slots:
+  void onClosedClicked();
+  void onUpdateLoad();
+  void onUpdateRun();
+  void onShowLogFile();
+  void onClearLogFile();
+  void onShowGlobalHistory(const QModelIndex &idx);
+  void onShowExerciseHistory(const QModelIndex &idx);
+  void onLoadSQL();
+  void onBackupDB();
+private:
+  void enaDisa();
+  bool parseUpdateFile(const QString &fileName, bool showUi = true);
+  void saveUpdateSql();
+private:
+  Ui::DBUpdate    *m_ui;
+  QSqlDatabase     m_db;
+  Update           m_update;
+  bool             m_showUi {true};
+  GlobalUpdatesModel      *m_globalUpdatesModel{nullptr};
+  GlobalUpdatesProxyModel *m_globalUpdatesProxyModel{nullptr};
+  ExercisesModel          *m_exercisesModel{nullptr};
+  ExercisesProxyModel     *m_exercisesProxyModel{nullptr};
+  ShowHistory             *m_showHistory{nullptr};
+  QString                  m_sql;
+  static QString           m_defaultPath;
+  LOGGER_T                 m_logger;
+};
+
+
+class DBUpdateRun : public QObject
+{
+  Q_OBJECT
+public:
+  explicit DBUpdateRun(const QString &updateFile,  bool generateOnly, bool withBackup, QObject *parent = nullptr);
+  ~DBUpdateRun();
+  bool init();
+  bool runUpdate();
+  bool runPgDump(const QString &dumpFile, const QString &dbHost, const QString &dbName);
+Q_SIGNALS:
+  void runSqlFailed();
+  void runSqlFinished();
+  void runPgDumpFailed();
+  void runPgDumpFinished();
+private:
+  void onPsqlFinished(int exitCode, QProcess::ExitStatus exitStatus);
+  void onPgDumpFinished(int exitCode, QProcess::ExitStatus exitStatus);
+  bool parseUpdateFile();
+  void generateSql();
+  bool runPsql();
+  QString executablePath(const QString &program);
+  void handleProcInit(const QString &program, const QStringList &args);
+  void handleProcFinished(int exitCode, QProcess::ExitStatus exitStatus);
+  void onErrorOccured(QProcess::ProcessError error);
+private:
+  QSqlDatabase        m_db;
+  Update              m_update;
+  bool                m_generateOnly;
+  bool                m_withBackup;
+  GlobalUpdatesModel *m_globalUpdatesModel{nullptr};
+  ExercisesModel     *m_exercisesModel{nullptr};
+  QProcess           *m_proc;
+  LOGGER_T            m_logger;
+};
+
+} // namespace DBUpdate