Changes to Search Contractors

for the query request parameter size, default value was changed from 50 to 10

query request parameter property_type list-of-types was narrowed by removing types string

for the query request parameter property_type, the type of property anyOf[subschema #1]/ was specialized from string to array

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