Ensure decrypted student passwords not visible in GoodJob arguments on failure

[danhalson]

Description

An error has been observed in the CreateStudentsJob where student passwords are visible in the arguments for the job in the GoodJob UI. This occurred whilst experiencing issues with profile, where a 503 was returned when the job was processed.

This may have something to do with the stage at which the failure occurred being after decryption in editor-api, but it still shouldn't be possible to see the passwords in the arguments - so this needs resolving.

https://editor-api.raspberrypi.org/admin/good_job/jobs/3eebd7e9-71ec-4915-bca6-017a2cf7efe1?locale=en