Delete an upload’s database record and primary stored file. For images, the endpoint also deletes the thumbnail.
This endpoint does not currently remove the upload’s search-index vectors or extracted document-figure artifacts. Deleted content may therefore remain discoverable through chat file search. Contact Trellis for sensitive-data erasure that requires purging derived content.
The upload is scoped through its owning chat to the authenticated member. An unknown upload or one owned by another member returns 404.