A ticket file is a file attached to a ticket as a whole rather than to one of its messages: a document an agent added
in Replyco, or the invoice of the ticket’s order that an order-management integration brought in. Files that arrive
with a customer’s message are message attachments; read those with
GET /openapi/bytefiles/messageattachments/{messageId}/links (see Files).
Each operation whose path ends in /paged allows one user 15 calls a minute (see
Rate limits). To read one file’s details, use GET /openapi/threadattachment/{id}.