Query params/attribution to be available for customers as data in canvas

The rest of the attribution query params are going to be added to the product in the following way: Query params will be available as mentions, so you can use them in the email trigger Send nodes, like webhook/redirect will include the captured query params We will allow hidden fields for any other third party purpose, including seeing the attribution in results tab We need to show, in the results page, the query params and hidden fields too