Changes to Get Leaderboards

added the optional property detail/items/ctx to the response with the 422 status

added the optional property detail/items/input to the response with the 422 status

for the query request parameter limit, the exclusiveMinimum was set to 1.00

for the query request parameter limit, the max was set to 300.00

for the query request parameter offset, the min was set to 0.00