The first appsettings migrations insert the default rows with fixed ids,
which a PostgreSQL id sequence does not see; the login lockout migration,
the first to insert without an id, then collided with id 1. It now moves
the sequence past the existing rows first (a no-op on sqlite), which also
covers a database upgraded from any earlier migration. A test compute
password exceeded its 14-character column, which only PostgreSQL enforces.
