* add keyset pagination for user ordered by username or display_name
* add index on display-name for user table
* update down_revision in migration script
* Add endpoints for getting, updating, deleting users by global user ID
* Resolve formatting
* Include alembic revision script
* Updated down_revision to current alembic head
Co-authored-by: Andreas Köpf <andreas.koepf@xamla.com>