feat: drop blanket recreates, ACME-DNS knobs, notify_push override

- Drop `recreate: always` from collabora/drawio/homarr/opencloud/traefik
  handlers and the authentik_outpost_ldap start task. `up -d` with
  `state: present` already recreates exactly the services whose
  compose definition changed; the blanket recreate was forcing
  restarts even when nothing relevant moved.
- Rewrite the `*_domains` Traefik Host loop to the `Host(\`a\`) ||
  Host(\`b\`)` form across authentik/collabora/garage/nextcloud so the
  rule still matches when traefik can't normalize the comma-form into
  the same canonical shape.
- Traefik: add `traefik_acme_tcp_only` (sets LEGO_EXPERIMENTAL_DNS_TCP_ONLY)
  and `traefik_acme_disable_ans_checks` (disables lego's authoritative-NS
  propagation check) for environments where the DNS path between the
  traefik container and the zone's nameservers is constrained.
- Traefik DMZ collector: two-step merge so a `traefik_dmz_exposed_services`
  entry that sets its own `backend_host` wins over the host fallback;
  lets a route target an internal FQDN covered by the backend cert's
  SANs instead of the raw IP.
- Nextcloud: add `nextcloud_notify_push_domain` override for the
  `occ notify_push:setup` call so the setup check can hit an internal
  FQDN instead of hairpinning through the DMZ. Push router now matches
  every entry in `nextcloud_domains`.
- Nextcloud: also %2F-escape slashes in the postgres user/password
  inside the notify_push DATABASE_URL.

roles/traefik/defaults/main.yml

@@ -33,6 +33,18 @@ traefik_acme_tsig_secret: ""  # TSIG secret
 traefik_acme_propagation_timeout: "120"
 traefik_acme_polling_interval: "2"
 traefik_acme_ttl: "60"
+# Force lego's DNS lookups (SOA resolution, propagation checks) onto
+# TCP instead of UDP. Useful when container egress can reach the
+# nameserver on TCP/53 but UDP/53 is blocked or unreliable. Sets the
+# upstream env var LEGO_EXPERIMENTAL_DNS_TCP_ONLY=true on the
+# traefik container.
+traefik_acme_tcp_only: false
+# Disable lego's propagation check against the zone's authoritative
+# nameservers. Use when the SOA-listed NS hostname resolves to an
+# address that isn't reachable from this traefik host (e.g. a DMZ
+# box that can only see the internal NS IP, not the public one).
+# lego still polls via the configured `resolvers:` list.
+traefik_acme_disable_ans_checks: false
 
 # Self-signed certificate configuration (for vagrant/testing)
 traefik_selfsigned_cert_dir: "{{ docker_volume_dir }}/certs"