[Feature Request] Admin option to remove existing archive files that v3 would no longer create

Description Since v3, PAPERLESS_ARCHIVE_FILE_GENERATION defaults to auto, which only creates a PDF/A archive file for scanned or image-based documents. Born-digital PDFs stay as the original ([migration guide]( That works well for new documents. My instance was running v2, where every document got an archive file by default. All the born-digital documents I consumed back then still have an archive file in media/archive, even though a fresh v3 install would not create one. I can’t find a supported way to get rid of them. What I found while looking • A maintainer said in [discussion #6801]( that there is no method to remove an archive file once it exists. That was in 2024, so it may be out of date. • In the same discussion, a user emptied the archive folder by hand. The preview then failed with a “not found” error, although the original could still be downloaded. • document_archiver only creates archive files. By default it skips documents that already have…