Fix critical discrepancies found during validation audit

- Fix cert resolver name (cloudflare -> letsencrypt)
- Fix volume paths (/mnt/nas -> /data)
- Add missing custom port mappings
- Add privileged/capability flags
- Add 8 new roles: portainer, n8n, nodered, influxdb, guacamole, watchtower, rtlamr2mqtt, telegraf
- Fix Traefik template (ports, ACME path, wildcard cert)
- Add extra volume mounts for media services

roles/telegraf/templates/docker-compose.yml.j2

@@ -0,0 +1,14 @@
+services:
+  telegraf:
+    image: {{ telegraf_image }}
+    container_name: telegraf
+    restart: unless-stopped
+    volumes:
+      - /data/telegraf/telegraf.conf:/etc/telegraf/telegraf.conf:ro
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    networks:
+      - {{ docker_network_name }}
+
+networks:
+  {{ docker_network_name }}:
+    external: true