Changes to Retained Dashboard

the response property progress/items/retained became optional for the status 200

response property progress/items/retained list-of-types was widened by adding types null to media type application/json of response 200

removed the required property progress/items/cumulative from the response with the 200 status

removed the required property progress/items/team_id from the response with the 200 status

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

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

added the optional property by_weekday to the response with the 200 status

endpoint added