infra_gateway: remove Home Assistant routing

Created by: jedmund

Summary

• Remove ha.atelier.house from the ddclient subdomain list
• Delete services-other.yml.j2 Traefik dynamic config (was the only entry)
• Remove services-other.yml.j2 from the Traefik deploy task loop
• Remove ha_server_ip variable from defaults

Home Assistant is now on a separate device at 192.168.1.5 that manages its own routing, so infra_gateway no longer needs to proxy it.

Notes

The deployed services-other.yml file will still exist on the server until manually removed — Traefik will continue serving ha.atelier.house until that file is deleted from the dynamic config directory.