Integrate OpenClaw with Existing Retail Automation System (Secure, Budget-Controlled)

We have working scripts and workflows. We need safe OpenClaw integration.

Existing:
- Invoice PDF parsing (Apps Script)
- CSV generation
- Lightspeed import process
- CRM data
- Scheduling logic

What needs to be built:
- Connect OpenClaw to existing workflows
- Automate invoice email → Lightspeed import
- Add approval gating before execution
- Add duplicate protection
- Add structured logging
- Implement global kill switch
- Implement per-module kill switches
- Sandbox AI agent (restricted permissions)
- Ensure no action executes without approval
- Optimize model cost usage

This is integration only. Do NOT propose rebuilding the entire system.
Security and simplicity are priority.