Allow editing the account email

Erwan Rouchet
2026-03-10T10:32:20Z

https://redmine.teklia.com/issues/12642

The PartialUpdateUser and UpdateUser endpoints should allow to edit the email of the user. The unique constraint on emails should be re-checked. When the email is valid and does not cause any conflicts, the user's verified_email status should be reset to False, and a new verification email should be sent.