tableId (string): The unique identifier of the table (how to get).
recordId (string): The unique identifier of the record to update (how to get).
fieldId (string): The ID of the attachment field to upload to (how to get)
Attachment fields can contain multiple attachments. This API allows uploading one attachment at a time to the end of the cell.To delete or reorder attachments, use the Update Record API.fieldId must be an attachment type field.Through the API, uploaded attachments are limited to 100MB in the cloud version, with no limit in the self-hosted version.