deploy/k8s/dev runs the base with 2 replicas alongside throwaway
services: two independent OpenLDAP servers (the dev image), PostgreSQL
18 and Mailpit.
deploy/k8s/dev/e2e.sh checks a running deployment: both probes,
registration with the activation mail sent over SMTP (and no password
in it), activation, login, and login and readiness while ldap1 is
scaled to zero. All checks pass.
