- Create cleanup script that removes Pulse SSH keys from nodes
- Add systemd path unit to watch for cleanup requests
- Add systemd service to execute cleanup script
- Update install-sensor-proxy.sh to install cleanup system
- Handles both cluster nodes (pulse-managed-key) and standalone nodes (pulse-proxy-key)
- Cleanup is triggered automatically when nodes are deleted from Pulse
- All cleanup actions are logged via syslog for auditability
