Changes to Public Articles Search

added the optional property items/allOf[#/components/schemas/Article]/group_id to the response with the 200 status

added the optional property items/allOf[#/components/schemas/Article]/modified_date to the response with the 200 status

added the optional property items/allOf[#/components/schemas/Article]/published_date to the response with the 200 status

added optional request body

added the media type application/json for the response with the status 200

added the new optional header request parameter X-Cursor