Function update_station_cache 

fn update_station_cache(
    msg_entry_change: MessageReader<'_, '_, AdjustTimetableEntry>,
    msg_schedule_change: MessageReader<'_, '_, AdjustVehicle>,
    timetable_entries: Query<'_, '_, &TimetableEntry>,
    station_caches: Query<'_, '_, &mut StationCache>,
)