Changes to GET /alerts/trends

the response property message became nullable for the status 401

the response property message became optional for the status 401

removed the required property data from the response with the 200 status

added the required property bucket to the response with the 200 status

added the required property days to the response with the 200 status

added the required property mttr to the response with the 200 status

added the required property timeSeries to the response with the 200 status

added the required property totals to the response with the 200 status

endpoint added