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>

arty.yml

@@ -53,6 +53,30 @@ envs:
     GOTIFY_COMPOSE_PROJECT_NAME: messaging
     GOTIFY_IMAGE: gotify/server:latest
     GOTIFY_TRAEFIK_HOST: gotify.pivoine.art
+    # Scrapy
+    SCRAPY_TRAEFIK_ENABLED: true
+    SCRAPY_COMPOSE_PROJECT_NAME: scrapy
+    SCRAPY_SCRAPYD_IMAGE: vimagick/scrapyd
+    SCRAPY_IMAGE: vimagick/scrapyd
+    SCRAPY_SCRAPYRT_IMAGE: vimagick/scrapyd
+    SCRAPY_TRAEFIK_HOST: scrapy.pivoine.art
+    SCRAPY_SCRAPYD_PORT: 6800
+    SCRAPY_SCRAPYRT_PORT: 9080
+    # n8n
+    N8N_TRAEFIK_ENABLED: true
+    N8N_COMPOSE_PROJECT_NAME: n8n
+    N8N_IMAGE: docker.n8n.io/n8nio/n8n
+    N8N_TRAEFIK_HOST: n8n.pivoine.art
+    N8N_PORT: 5678
+    N8N_DB_NAME: n8n
+    N8N_DB_SCHEMA: public
+    # Filestash
+    STASH_TRAEFIK_ENABLED: true
+    STASH_COMPOSE_PROJECT_NAME: stash
+    STASH_IMAGE: machines/filestash:latest
+    STASH_TRAEFIK_HOST: stash.pivoine.art
+    STASH_PORT: 8334
+    STASH_CANARY: true
     # Proxy
     PROXY_COMPOSE_PROJECT_NAME: proxy
     PROXY_DOCKER_IMAGE: traefik:latest