* feat: allow changing an account email in the superadmin settings
* fix: cover slack_email and usage rows, and scope job rewrites to the queue
* fix: compare the destination email case-insensitively
* fix: only warn about the consequences once the email is edited
* docs: warn that changing an account email is a last resort
* fix: repoint app policies and raw-email permissioned_as, reject self-change
* fix: repoint folder default rules and guard the varchar(55) job column
