Employees: Past data for weekly working hours and work schedule

Hello,

We want to access past / history data for employees with regard to their working hours and work schedules, so that we can properly calculate their availability for past, current, and future dates in our BI reporting tool.

The endpoint https://developer.personio.de/reference#get_company-employees only returns the current values.

Is there any way to access the previous values?

Especially work schedules already have a valid_from property that indicates the starting date for each work schedule. We want to access the past work schedules.

Does Personio save revisions of each employee edit? Can they be accessed via the API? Or would it be possible to introduce a dedicated new endpoint for retrieving the work schedule history for an employee?

Thanks in advance,
Daniel Kudwien