FunnelLingo backend

This is the license + version API for the FunnelLingo Chrome extension. There is no UI here.

• GET /api/config — remote config / version channel
• POST /api/activate — license activation
• POST /api/heartbeat — periodic re-validation
• GET /api/devices?licenseKey=... — list activations
• POST /api/devices/deactivate — free a device slot

See README.md in this app for the full contract.