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>

CLAUDE.md

@@ -16,6 +16,9 @@ Root `compose.yaml` uses Docker Compose's `include` directive to orchestrate mul
 - **awsm**: Next.js application with SQLite
 - **track**: Umami analytics (PostgreSQL)
 - **gotify**: Push notification server
+- **scrapy**: Scrapyd web scraping cluster (scrapyd, scrapy, scrapyrt)
+- **n8n**: Workflow automation platform (PostgreSQL)
+- **stash**: Filestash web-based file manager
 - **vpn**: WireGuard VPN (wg-easy)
 
 All services connect to a single external Docker network (`falcon_network` by default, defined by `$NETWORK_NAME`).
@@ -41,6 +44,7 @@ Services expose themselves via Docker labels:
 `core/postgres/init/01-init-databases.sh` runs on first PostgreSQL startup:
 - Creates `directus` database for Sexy CMS
 - Creates `umami` database for Track analytics
+- Creates `n8n` database for workflow automation
 - Grants privileges to `$DB_USER`
 
 ## Common Commands
@@ -134,6 +138,33 @@ Next.js app with embedded SQLite:
 - Optional webhook secret for database updates
 - Database persisted in `awesome_data` volume
 
+### Scrapy (scrapy/compose.yaml)
+Web scraping cluster with three services:
+- **scrapyd**: Scrapyd daemon exposed at `scrapy.pivoine.art:6800`
+  - Web interface for deploying and managing spiders
+  - Data persisted in `scrapyd_data` volume
+- **scrapy**: Development container for running Scrapy commands
+  - Shared `scrapy_code` volume for spider projects
+- **scrapyrt**: Scrapyd Real-Time API on port 9080
+  - Run spiders via HTTP API without scheduling
+
+### n8n (n8n/compose.yaml)
+Workflow automation platform:
+- **n8n**: n8n application exposed at `n8n.pivoine.art:5678`
+  - Visual workflow builder with 200+ integrations
+  - PostgreSQL backend for workflow persistence
+  - Runners enabled for task execution
+  - Webhook support for external triggers
+  - Data persisted in `n8n_data` volume
+
+### Stash (stash/compose.yaml)
+Web-based file manager:
+- **filestash**: Filestash app exposed at `stash.pivoine.art:8334`
+  - Support for multiple storage backends (SFTP, S3, Dropbox, Google Drive, FTP, WebDAV)
+  - In-browser file viewer and media player
+  - File sharing capabilities
+  - Data persisted in `filestash_data` volume
+
 ## Important Environment Variables
 
 Key variables defined in `arty.yml` and overridden in `.env`:
@@ -153,6 +184,9 @@ Each service uses named volumes prefixed with project name:
 - `core_postgres_data`, `core_redis_data`: Database persistence
 - `core_directus_uploads`, `core_directus_bundle`: Directus media/extensions
 - `awesome_data`: AWSM SQLite database
+- `scrapy_scrapyd_data`, `scrapy_scrapy_code`: Scrapy spider data and code
+- `n8n_n8n_data`: n8n workflow data
+- `stash_filestash_data`: Filestash configuration and state
 - `proxy_letsencrypt_data`: SSL certificates
 
 Volumes can be inspected with: