feat: add Scrapy, n8n, and Filestash stacks to Falcon

Added three new service stacks to the docker-compose infrastructure:

- **Scrapy stack** (scrapy.pivoine.art):
  - scrapyd: Web scraping daemon with web interface (port 6800)
  - scrapy: Development container for spider commands
  - scrapyrt: Real-time API for running spiders (port 9080)

- **n8n stack** (n8n.pivoine.art):
  - Workflow automation platform with PostgreSQL backend
  - 200+ integrations for automated tasks
  - Runners enabled for task execution
  - Webhook support for external triggers

- **Filestash stack** (stash.pivoine.art):
  - Web-based file manager with multi-backend support
  - Supports SFTP, S3, Dropbox, Google Drive, FTP, WebDAV
  - In-browser file viewing and media playback

Infrastructure updates:
- Updated PostgreSQL init script to create n8n database
- Added environment variables to arty.yml for all three stacks
- Updated compose.yaml include list
- Updated CLAUDE.md and README.md documentation
- Normalized service names in existing stacks (gotify, proxy, umami, vpn)

All services integrated with Traefik for SSL termination and include
Watchtower auto-update labels.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

umami/compose.yaml

@@ -1,37 +1,37 @@
 services:
-  umami_app:
+  umami:
     image: ${TRACK_DOCKER_IMAGE}
     container_name: ${TRACK_COMPOSE_PROJECT_NAME}_app
     restart: unless-stopped
     environment:
       TZ: ${TIMEZONE:-Europe/Amsterdam}
-      
+
       # Database Configuration
       DATABASE_URL: postgresql://${DB_USER}:${DB_PASSWORD}@${CORE_DB_HOST}:${CORE_DB_PORT}/${TRACK_DB_NAME}
       DATABASE_TYPE: postgresql
-      
+
       # Application Secret
       APP_SECRET: ${TRACK_APP_SECRET}
-      
+
       # Redis Cache Integration
       REDIS_URL: redis://${CORE_REDIS_HOST}:${CORE_REDIS_PORT}
       CACHE_ENABLED: true
-      
-      
+
+
     networks:
       - compose_network
-      
+
     healthcheck:
       test: ["CMD-SHELL", "curl -f http://localhost:3000/api/heartbeat || exit 1"]
       interval: 30s
       timeout: 10s
       retries: 5
       start_period: 40s
-      
+
     labels:
       # Traefik Configuration
       - 'traefik.enable=${TRACK_TRAEFIK_ENABLED:-true}'
-      
+
       # HTTP to HTTPS redirect
       - 'traefik.http.middlewares.${TRACK_COMPOSE_PROJECT_NAME}-redirect-web-secure.redirectscheme.scheme=https'
       - 'traefik.http.routers.${TRACK_COMPOSE_PROJECT_NAME}-web.middlewares=${TRACK_COMPOSE_PROJECT_NAME}-redirect-web-secure'