Copies the Agentix tables migration into your repo so the Ecto/Postgres persistence
adapter (Agentix.Persistence.Ecto) has its schema.
mix agentix.gen.migration
mix agentix.gen.migration priv/repo/migrations --repo MyApp.RepoWrites a timestamped *_create_agentix_tables.exs under the given directory (default
priv/repo/migrations); then run mix ecto.migrate. The migration module is namespaced
under your repo — inferred from the host app name, or set explicitly with --repo. The
Ecto-backed suspension expiry additionally needs Oban's own migration (see Oban's docs).