Downloads delivery logs as CSV or JSON using the same filters as the list endpoint. Format resolution: (1) optional query parameter Format=csv or Format=json overrides everything when present; (2) otherwise the Accept header is used (text/csv, application/csv, application/json, or *+json); (3) otherwise the response defaults to JSON. Page (0-based) is the last list page index to include: pages 0 through Page are read, each with PageSize items (max 100, default 50), up to 25,000 rows total. This matches the delivery-log UI, which sends the highest page the user has loaded. Page=0 exports only the first page.