Added health indicators to listings data endpoints
These are now removed and replaced by much richer performance metrics.
GET /v1/listingsGET /v1/listings/:listing_id
Added health_7_day, health_30_day, health_60_day to endpoint.
These are now removed and replaced by much richer performance metrics.
GET /v1/listingsGET /v1/listings/:listing_idAdded health_7_day, health_30_day, health_60_day to endpoint.