This is a massive overhaul to the SQL Storage for Authelia. It facilitates a whole heap of utility commands to help manage the database, primary keys, ensures all database requests use a context for cancellations, and paves the way for a few other PR's which improve the database.
Fixes#1337
When a user use Authelia for the first time no device is enrolled in DB.
Now we test that the user does see the "not registered" message when
no device is enrolled and see the standard 2FA method when a device is
already enrolled.