feat: standardize traefik.docker.network labels across all docker-compose files

- Add traefik.docker.network=traefik-network label to all local services with traefik.enable=true
- Ensures consistent network selection for Traefik IP discovery
- Prevents routing conflicts when services are on multiple networks
- Updated 12 docker-compose files with 32+ service labels
- Maintains dual network access (homelab-network + traefik-network) for web UIs

docker-compose/vpn/docker-compose.yml

@@ -45,6 +45,7 @@ services:
       - "homelab.category=downloaders"
       - "homelab.description=VPN client for secure downloads"
       - "traefik.enable=true"
+      - "traefik.docker.network=traefik-network"
       # Router configuration
       - "traefik.http.routers.qbittorrent.rule=Host(`qbit.kelinreij.duckdns.org`)"
       - "traefik.http.routers.qbittorrent.entrypoints=websecure"