bug: Import of large streaming history failes

[jo-gross]

Describe the bug

When I try to import my Extended Audio, it fails. The browser network analysis shows HTTP Status 413 (Content too large). → A helpful feedback message or warning that the content is too large would be practical here.

Expected behavior

A better info about what went wrong. Or maybe upload each file in a single request, instead of one large. When importing each file after file it would be great to see, not only "Import of XY from full-privacy", instead also the file name that was imported, would be nice.

Additional context

I cleared the logs, before importing - nothing appears when calling the full-privacy endpoint.
Docker-compose is the same as here in the repo.

Screenshots