* perf: add idx cache
* Update crates/atuin-server-postgres/migrations/20240614104159_idx-cache.sql
* indentation
* remove trigger - for each row is too much, should be once per transaction
* add verified column to users table
* add database functions to check if verified, or to verify
* getting there
* verification check
* use base64 urlsafe no pad
* add verification client
* clippy
* correct docs
* fix integration tests
