Changes to Keyword timeline

added the optional property code to the response with the 400 status

added the optional property code to the response with the 404 status

added the optional property code to the response with the 500 status

added the optional property message to the response with the 400 status

added the optional property message to the response with the 404 status

added the optional property message to the response with the 500 status

added the optional property reference to the response with the 400 status

added the optional property reference to the response with the 404 status

added the optional property reference to the response with the 500 status

for the query request parameter days, default value 365 was added

for the query request parameter days, the type changed from number to integer

for the query request parameter days, the min was set to 1.00

endpoint added