We should audit when a service manager changes a user profile that is not
their own. This can be recorded in our events table, which is currently
only used to record successful logins.
This adds two new types of event, `update_user_email` and
`update_user_mobile_number` which store the
- browser fingerprint
- IP address
- user id of the user being updated
- user id of the service manager making the change
- original email address and new email address (for `update_user_email`
events)
- original mobile number and new mobile number (for
`update_user_mobile_number` events)
