Changes to Add ML Backend

request body became required

the request property project became required

the request property url became required

the url request property's minLength was increased from 0 to 1

the extra_params request property type changed from object to no type

added the new optional request property auto_update

added the new optional request property model_version

added the media type application/x-www-form-urlencoded to the request body

added the media type multipart/form-data to the request body

the request optional property basic_auth_pass became write-only

the request property basic_auth_pass became nullable

the request property basic_auth_user became nullable

the request property description became nullable

the request property extra_params became nullable

the request property title became nullable

the timeout request property type was generalized from integer to number, and format from no format to double