Add shared Docker network and Miniflux plugin for Hermes

- Create external 'monotrope' Docker network so services can
  communicate by container name
- Add Miniflux to the shared network (db stays on internal network)
- Add Hermes Miniflux plugin with list_feeds and get_unread_entries tools
- Mount plugin directory and pass Miniflux API key to Hermes container

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infra/miniflux/docker-compose.yml

@@ -12,6 +12,9 @@ services:
         condition: service_healthy
     ports:
       - "127.0.0.1:8080:8080"
+    networks:
+      - default
+      - monotrope
     environment:
       DATABASE_URL: "postgres://miniflux:${MINIFLUX_DB_PASSWORD}@db/miniflux?sslmode=disable"
       RUN_MIGRATIONS: "1"
@@ -44,5 +47,10 @@ services:
       timeout: 5s
       retries: 5
 
+networks:
+  default:
+  monotrope:
+    external: true
+
 volumes:
   miniflux_db: