Switch pgadmin to infra network

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -15,8 +15,7 @@ services:
       - ./servers.json:/pgadmin4/servers.json:ro
       - ./pgpass:/pgadmin4/pgpass:ro
     networks:
-      - proxy
+      - infra
-      - atproto
     labels:
       - "traefik.enable=true"
       # Production route: pgadmin.primal.host
@@ -42,7 +41,5 @@ volumes:
   pgadmin_data:
 
 networks:
-  proxy:
+  infra:
-    external: true
-  atproto:
     external: true