Import connected study attachments

Attach a study file from one of the member's own connected apps instead of uploading it: a file in Google Drive, OneDrive or Dropbox, a Figma frame (it comes in as a PNG at up to twice its size), or a Canva design (a PNG for one page, a PDF for several, or an MP4 when its ref asks for a video). Name the app and the item's ref as alpha_connector_files_list returned it. Point11 reads it with the member's own connection and admits it exactly as an upload, converting a file a study cannot read as it is (a Google document comes in as a PDF). Returns the attachment, ready to reference from a study question; retrying with the same Idempotency-Key answers the same file without reading the app again. Connect the app in Settings, under Connections, first. A video also returns its storyboard, which starts as preparing: read research_study_attachments_get_v2 until it is ready, refused or failed.