Changes to Submit an exact reviewed artifact (requires verified candidate API key and explicit authorization)

added the new required request property compiled_artifact_hash

added the new required request property compiled_artifact_id

added the new required request property compiled_authorization_id

removed the request property cover_letter

removed the request property experience_years

removed the request property github_url

removed the request property skills

added the non-success response with the status 409

added the new required request property principal_authorized

added the non-success response with the status 403