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/ExerciseManagement/WebSocketInterface/data_manager.cpp

@@ -0,0 +1,68 @@
+/**
+  * @RDE_HEADER@
+  * The DataManager class handles data to be send to the websocket
+  * offers an interface to get and set structure data
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Philipp Dassow, SLST, 2017-12-05
+  */
+#include "data_manager.h"
+#include "Messages/reply_message.h"
+#include "object_exercise.h"
+
+namespace ExerciseManagement
+{
+namespace WebSocketInterface
+{
+//---------------------------------------------------------------------------------------------------------
+DataManager::DataManager(const std::shared_ptr<DatabaseInterface> &dbInterface, const std::shared_ptr<HandlerExercise> &exHandler)
+  : LtsWebSocket::DataManagerBaseDl<DatabaseInterface>(dbInterface, getLogger("DataManager"))
+  , m_exerciseHandler(exHandler)
+{}
+
+LtsWebSocket::ReplyMessage *DataManager::exercisePhaseBaseData(const QString &uuid) const
+{
+  return toBaseDataMessageFromDb<Database::ExmExercisePhase, Messages::ExercisePhaseBaseData>(uuid);
+}
+
+LtsWebSocket::ReplyMessage *DataManager::exerciseStateChangeBaseData(const QString &uuid) const
+{
+  return toBaseDataMessageFromDb<Database::ExmExerciseStateChange, Messages::ExerciseStateChangeBaseData>(uuid);
+}
+
+LtsWebSocket::ReplyMessage *DataManager::exerciseBaseData(const QString &uuid) const
+{
+  return toBaseDataMessageFromDb<Database::ExmExercise, Messages::ExerciseBaseData>(uuid);
+}
+
+LtsWebSocket::ReplyMessage *DataManager::exerciseInformation(const QString &uuid) const
+{
+  using namespace Messages;
+
+  ExerciseInformationMessage::ExInformation exInfo;
+  QVector<ExerciseInformationMessage::ExInformation> data;
+  const auto &exerciseMap = m_exerciseHandler->getExerciseMap();
+  data.reserve(exerciseMap.size());
+  for (const ObjectExercise *ex : exerciseMap)
+  {
+    const auto &exData = ex->data();
+
+    exInfo.exerciseId  = exData.id;
+    exInfo.name        = exData.name;
+    exInfo.beginTime   = exData.beginTime.toMSecsSinceEpoch();
+    exInfo.endTime     = exData.endTime.toMSecsSinceEpoch();
+    exInfo.startTime   = exData.startTime.toMSecsSinceEpoch();
+    exInfo.stopTime    = exData.stopTime.toMSecsSinceEpoch();
+    exInfo.timeZone    = exData.defaultTimeZone;
+    exInfo.status      = exData.exerciseStateId.underlying();
+    exInfo.description = exData.description;
+
+    data.append(exInfo);
+  }
+
+  return new ExerciseInformationMessage(data, uuid);
+}
+
+} // namespace WebSocketInterface
+} // namespace ExerciseManagement