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/NmeaManagement/socket_handler.cpp

@@ -29,8 +29,7 @@ SocketHandler::SocketHandler(const std::shared_ptr<DdsHandler> &ddsHandler,
   m_reconnectTimer = new QTimer(this);
 
   // setup signal and slot
-  connect(m_reconnectTimer, SIGNAL(timeout()),
-          this, SLOT(reconnectTimerSlot()));
+  connect(m_reconnectTimer, &QTimer::timeout, this, &SocketHandler::reconnectTimerSlot);
 
 }
 
@@ -39,11 +38,11 @@ void SocketHandler::init(QString nmeaHost, int nmeaPort)
   m_nmeaHost = nmeaHost;
   m_nmeaPort = nmeaPort;
   socket = new QUdpSocket(this);
-  connect(socket, SIGNAL(connected()), this, SLOT(connected()));
-  connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected()));
-  connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead()));
+  connect(socket, &QUdpSocket::connected, this, &SocketHandler::connected);
+  connect(socket, &QUdpSocket::disconnected, this, &SocketHandler::disconnected);
+  connect(socket, &QUdpSocket::readyRead, this, &SocketHandler::readyRead);
 
-  connect(socket, SIGNAL(bytesWritten(qint64)), this, SLOT(bytesWritten(qint64)));
+  connect(socket, qOverload<qint64>(&QUdpSocket::bytesWritten), this, &SocketHandler::bytesWritten);
 
   INFO_LOG(m_logger) << "Connecting,..";
   INFO_LOG(m_logger) << nmeaHost << " port: " << nmeaPort;