I've been using a different ecommerce platform for years, and I'm in the very beginning stages of figuring out how to migrate all my product data from that site to Squarespace. The options for adding product data in Squarespace seem to be very limited, and I'm hoping I'm just missing something. I want to be able to track information such as where I purchased a product and how much I paid - info that I would input when adding a product, but not make visible to customers. My old site didn't have fields intended for that info, but there were enough back end, admin-only fields that I was able to repurpose a couple. I don't see any similar place for 'behind the scenes' info in Squarespace. Is there a way to do this that I'm not seeing?