Have postgres.telegraf_users include postgres.enabled

postgres_wait_ready requires docker_container: so-postgres, which is
declared in postgres.enabled. Running postgres.telegraf_users on its own
— as the reactor orch and the soup post-upgrade step both do — errored
because Salt couldn't resolve the require.

Include postgres.enabled from postgres.telegraf_users so the container
state is always in the render. postgres.enabled already includes
telegraf_users; Salt de-duplicates the circular include and the included
states are all idempotent, so repeated application is a no-op.

salt/postgres/telegraf_users.sls

@@ -8,6 +8,13 @@
 {%   from 'vars/globals.map.jinja' import GLOBALS %}
 {%   from 'telegraf/map.jinja' import TELEGRAFMERGED %}
 
+{# postgres_wait_ready below requires `docker_container: so-postgres`, which is
+   declared in postgres.enabled. Include it here so state.apply postgres.telegraf_users
+   on its own (from the reactor orch or from soup) still has that ID in scope. Salt
+   de-duplicates the circular include. #}
+include:
+  - postgres.enabled
+
 {% set TG_OUT = TELEGRAFMERGED.output | upper %}
 {% if TG_OUT in ['POSTGRES', 'BOTH'] %}