API Support for Uploading Candidate Attachments

Hi Personio Developer Team,

We're currently evaluating the Personio API for an ATS integration and noticed that there doesn't seem to be an endpoint for uploading attachments to candidates.

Our use case requires uploading documents such as CVs, assessment reports, and interview questions directly to a candidate's profile.

Could you clarify:

Is there currently any supported way to upload attachments to a candidate via the API?

If not, is this functionality planned or on your API roadmap?

Are there any recommended workarounds for integrating external assessment reports and other candidate documents into Personio?

This would be an important capability for integrating third-party assessment and recruiting solutions.

Thanks in advance for your feedback!