as per ^ we're moving the public_key to the cookies column so i dropped those columns from users and sessions.
[[ https://linear.app/comm/issue/ENG-1965/remove-public-key-columns-from-mysql-users-and-sessions-table | linear task ]]
[[ https://linear.app/comm/issue/ENG-1963/make-hash-column-in-mysql-users-table-optional | another linear task ]]