POST /api/v1/license/deactivate Request:
"valid": true, "expires_at": "2026-01-01", "features": ["themes", "auto-updates"], "remaining_days": 365 Webcatalog License Key
"license_key": "encoded-key", "machine_id": "device-fingerprint" POST /api/v1/license/deactivate Request: "valid": true
"license_key": "...", "machine_id": "..." "remaining_days": 365 "license_key": "encoded-key"