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>

restic/config.json

@@ -131,24 +131,6 @@
         }
       }
     },
-    {
-      "id": "scrapy-backup",
-      "repo": "hidrive-backup",
-      "paths": [
-        "/volumes/scrapyd_data",
-        "/volumes/scrapy_code"
-      ],
-      "schedule": {
-        "cron": "0 6 * * *"
-      },
-      "retention": {
-        "policyTimeBucketed": {
-          "daily": 7,
-          "weekly": 4,
-          "monthly": 3
-        }
-      }
-    },
     {
       "id": "n8n-backup",
       "repo": "hidrive-backup",