API- alter prices for a specific channel

Right now, property_uid returns all the listings in a property group. When we call get-calendar-data with that property_uid, every day comes back tagged listing_uid airbnb, never the airgms one.

Since get-calendar-data only takes property_uid, from_date, and to_date with no channel filter, please create an endpoint or parameter that returns pricing for one specific listing_uid.