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/FileManagement/thp_script_httq.cpp

@@ -98,14 +98,14 @@ ThpScriptServer::ThpScriptServer(QObject *parent)
           this, [this]()
   {
     emit signalBroadcastMessage(readContentFile());
-  }, Qt::UniqueConnection);
+  });
 
 
   connect(this, &ThpScriptServer::signalBroadcastNewScriptsJsFile,
           this, [this]()
   {
     emit signalBroadcastMessage2(readScriptsJsFile());
-  }, Qt::UniqueConnection);
+  });
 
 
   connect(mWsSvr, &QWebSocketServer::newConnection,