Safe OpenClaw config updates with automatic backup, validation, and rollback. For agent use - prevents invalid config updates.
**Summary**: Introduces atomic, automatic config updates with built-in backup, validation, and rollback. - Added `atomic_apply.sh` for one-step safe config changes; creates backups, validates, and auto-rolls back on failure. - Removed legacy scripts: `backup_config.sh` and `diff_config.sh`. - Updated workflow and documentation to enforce atomic updates and automatic rollback. - Tightened guardrails to only allow validated, agent-initiated config changes. - Backups now stored in `~/.openclaw/config-guardian-backups/`.