chore: remove awsm stack

Remove awsm service and related configuration:
- Removed awsm from compose includes
- Deleted awsm/compose.yaml
- Removed awesome-backup from restic config
- Removed awsm volume mount from restic
- Removed AWSM env vars from arty.yml
- Removed awsm/import script

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

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

restic/config.json

@@ -93,21 +93,6 @@
         }
       }
     },
-    {
-      "id": "awesome-backup",
-      "repo": "hidrive-backup",
-      "paths": ["/volumes/awesome_data"],
-      "schedule": {
-        "cron": "0 5 * * *"
-      },
-      "retention": {
-        "policyTimeBucketed": {
-          "daily": 7,
-          "weekly": 4,
-          "monthly": 6
-        }
-      }
-    },
     {
       "id": "mattermost-backup",
       "repo": "hidrive-backup",