Any talk of required fields is a non-starter. Just forget about it. Don't use them. Whether a field is "sensitive" may change after the field is defined and us

Any talk of required fields is a non-starter. Just forget about it. Don't use them. Whether a field is "sensitive" may change after the field is defined and used all over the place, so you can't just move it without changing all the code. But you can easily add a option (like [non_sensitive=true]) to any field so your redaction code picks it up.