Describe the bug
JSON file uploads are not removed after being added to a reader study. This might also affect algorithm jobs and archive items after the recent refactoring in #3465. A consequence is that a verified user cannot upload more than 1000 files per day.

To Reproduce
Try to upload a JSON file:

upload_display_sets.append(
            {
                "baseline-lesion-distances": [Path(bl_distances)], # JSON file
                "follow-up-lesion-distances": [Path(fu_distances)], # JSON file
            },
        )
 
display_set_pks = client.add_cases_to_reader_study(
    reader_study=upload_reader_study_slug,
    display_sets=upload_display_sets
)

The files will appear in the display set as expected. However, the uploads will not have been removed.

Expected behavior

The uploads are removed after processing