Migrates remaining services and plugins to generated rtiddsgen API

Converts accessor calls to plain member access across the residual service set.

qt6-after/qt6-migrated-legatus/Lts/Services/ExerciseManagement/exercise_state_manager.cpp

@@ -58,7 +58,7 @@ namespace ExerciseManagement
 
   QString ExerciseStateManager::toString(ExerciseManagement::ExerciseState state)
   {
-    switch (state.underlying())
+    switch (state)
     {
       case ExerciseState::Unknown:
         return tr("UNKNOWN");
@@ -74,7 +74,7 @@ namespace ExerciseManagement
         return tr("TERMINATED");
     }
 
-    return tr("Unknown State: (%1)").arg(state.underlying());
+    return tr("Unknown State: (%1)").arg(state);
   }
 
   void ExerciseStateManager::setStateInternal(ExerciseManagement::ExerciseState state)