Remove copenhagen-a from docker_hosts and docker_services (#45)

Docker is masked on copenhagen-a and Minecraft is no longer managed
via Docker Compose. Removes:
- copenhagen-a from [docker_hosts] inventory group
- docker_services var from copenhagen-a host_vars
- docker_services role from Stage 4d deploy play

MaNGOS systemd services remain unchanged.

Fixes PESO-104

ansible/deploy.yml

@@ -72,12 +72,11 @@
     - role: firewall_alpine
     - role: docker_services
 
-# copenhagen-a: Gaming servers
+# copenhagen-a: Gaming servers (MaNGOS only — Docker removed per PESO-104)
 - name: "Stage 4d: Gaming servers (copenhagen-a)"
   hosts: copenhagen-a
   tags: [services, gaming]
   roles:
-    - role: docker_services
     - role: systemd_services
 
 # london-a: Monitoring stack (FreeBSD — Prometheus, Grafana)

ansible/inventory/host_vars/copenhagen-a.yml

@@ -3,9 +3,6 @@ host_role: gaming
 host_description: "Gaming servers (Minecraft, WoW/MaNGOS)"
 host_location: "Copenhagen"
 
-docker_services:
-  - minecraft
-
 # MaNGOS runs as systemd services, not Docker
 # MariaDB is the MaNGOS database backend (character, world, auth DBs)
 # cloudflared provides Cloudflare Tunnel access

ansible/inventory/hosts.ini

@@ -21,7 +21,6 @@ london-b
 helsinki-a
 london-b
 nuremberg-a
-copenhagen-a
 
 [monitoring]
 london-a