25f4ad12bc
Thread the manager assignment between the FIFA squad path and Core: - CoreAccess gains get_squad_manager/set_squad_manager (GET/PUT /club/manager); HttpCoreClient implements both. - project_active_squad fetches the assigned manager owned item and passes it to the projector (non-fatal on error/absence). - handle_put_squad authorizes the resolved manager against the active club (like a slot) and persists it via set_squad_manager after the atomic squad replace; fails loudly, never silently drops it.