chore: remove sablier, scrapy, and vpn stacks

Remove three unused stacks and related configuration:
- Removed sablier, scrapy, vpn from compose includes
- Deleted sablier/compose.yaml, scrapy/compose.yaml, vpn/compose.yaml
- Removed scrapy-backup from restic config
- Removed scrapy volume mounts from restic compose
- Removed SABLIER, SCRAPY, VPN env vars from arty.yml
- Cleaned up sexy/uploads directory

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

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

compose.yaml

@@ -4,7 +4,6 @@ include:
   - sexy/compose.yaml
   - mattermost/compose.yaml
   - tandoor/compose.yaml
-  - scrapy/compose.yaml
   - n8n/compose.yaml
   - links/compose.yaml
   - vault/compose.yaml
@@ -15,7 +14,6 @@ include:
   - restic/compose.yaml
   - netdata/compose.yaml
   - umami/compose.yaml
-  - sablier/compose.yaml
   - proxy/compose.yaml
   - watch/compose.yaml
   - media/compose.yaml