Changes to Get daily rating history (last N days)

the response property items/rating became nullable for the status 200

the response property items/rating_count became nullable for the status 200

added the optional property items/delta_breakdown to the response with the 200 status

added the optional property items/delta_total to the response with the 200 status

added the required property items/breakdown to the response with the 200 status

removed the required property items/month from the response with the 200 status

deleted the query request parameter months

added the new optional query request parameter days

added the required property items/date to the response with the 200 status

endpoint added