Lts/Services: finalize Qt6/C++17 migration cleanup

Remove deprecated Qt5 patterns remaining in Services:

- Replace remaining SIGNAL/SLOT string syntax with function pointer syntax
  (NmeaManagement/socket_handler.cpp, AudioVideoManagement/ModuleTests/mvs_tests.cpp)

- Remove Qt::UniqueConnection (deprecated in Qt6, default behavior) from
  19 files across AES, CES plugins, and cross-services (47 occurrences)

- Remove umbrella #include <QtCore> from fire_automaton.h and
  aes_test_fire_automaton.h (specific includes suffice)

25 files changed, 74 insertions(+), 81 deletions(-)

qt6-after/qt6-migrated-legatus/Lts/Services/WarehouseGuez/WsBaseDataInterface/data_manager.cpp

@@ -420,7 +420,7 @@ void DataManager::createTriggerForExercise(NSqlQuery &q, int exerciseId)
 
   // create subscription
   connect(driver, QOverload<const QString &, QSqlDriver::NotificationSource, const QVariant &>::of(&QSqlDriver::notification),
-          this, &DataManager::onNotification, Qt::UniqueConnection);
+          this, &DataManager::onNotification);
 
   if (!driver->subscribeToNotification(triggerNameExercise))
     WARNING_LOG(m_logger) << "Error subscribing to DB notification " << triggerNameExercise;