Changes to Post Reference Check

removed the enum value assistant from the query request parameter upload_for

added the new enum value full_text_assistant to the query request parameter upload_for

query request parameter file_url list-of-types was widened by adding types null

query request parameter pdf_url list-of-types was widened by adding types null

for the query request parameter file_url, the minLength was decreased from 1 to 0

for the query request parameter pdf_url, the minLength was decreased from 1 to 0

for the query request parameter file_url, the type was generalized from string to no type, and format from uri to no format

for the query request parameter pdf_url, the type was generalized from string to no type, and format from uri to no format

request property file list-of-types was widened by adding types null to media type multipart/form-data

request property pdf list-of-types was widened by adding types null to media type multipart/form-data