This is a Cloudflare worker that allows downloading the latest version of a resource from opentransportdata.swiss, which is useful, because SBB does not provide a static download link but a link changing with every update (which can be as often as daily).
GET https://sbb-data-download.trainy.app/packages/:package_id/resources/:file_namePackages can be found on opentransportdata.swiss.
For example, the package ID for the business organisation dataset is business-organisation-v2, and the file name for the full business organisation CSV is full-business-organisation.csv.