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>

compose.yaml

@@ -1,7 +1,6 @@
 name: falcon
 include:
   - core/compose.yaml
-  - awsm/compose.yaml
   - sexy/compose.yaml
   - mattermost/compose.yaml
   - tandoor/compose.yaml