Add docker-compose-helper.sh to auto-detect and use:
- docker-compose (V1 - standalone)
- docker compose (V2 - plugin)
Update all 9 management scripts to use the helper:
- start.sh, stop.sh, restart.sh
- logs.sh, status.sh
- backup.sh, restore.sh, update.sh, cleanup.sh
This fixes "docker-compose: command not found" error on systems
with Docker Compose V2 installed.
Co-Authored-By: Claude Sonnet 4 <noreply@anthropic.com>
