Thank you for this wonderful work!

If we consider this architecture from the point of view of organizing the interaction of independent modules, everything is very good. But in terms of domain organization - not very good. Where are the aggregates? Where are their value objects? All this can be fully organized and mapped to the Doctrine. You've got an anemic domain model, wrapped in user cases. But I will still make allowances for the fact that you have not programmed in Symphony for a very long time. Perhaps I will fork your project and add a little of my vision. Thank you for this wonderful work!