Changes to Register an organization host

added the new optional request property transport_mode

added the non-success response with the status 409

added the required property transport_mode to the response with the 200 status

added the required property transport_mode to the response with the 201 status

added the pattern ^[\x21-\x7e]{32,}$ to the request property secret

the secret request property's minLength was decreased from 1 to 0

endpoint added