I'm using the Negotiation API to send offers to eligible watchers on a weekly basis. On my website I have a table of my listings and offers, and when an offer is sent I can store the offerID that it gives me. I read something about offers having different statuses such as pending, declined, accepted, expired, etc. but I don't think this is for offers sent using the negotiation API. Is there any way to check the status of these? I'd love users to be able to look at past offers and see how many are still pending, how many were accepted/declined, and use some data analysis there for them to be able to figure out what discounts and margins work best for sending offers.