Please include project ID in Attendances API

To connect a invoicing software by personio API, there is the need to retrieve not only employee, time and break, but also the project for which the time was recorded.
API: https://developer.personio.de/reference#get_company-attendances

Project also need to be posted, to connect, for example, external project databases.
API: https://developer.personio.de/reference#post_company-attendances