📱 SMS Gammu Gateway

REST API Endpoints:
• GET /status/signal - Signal strength
• GET /status/network - Network information
• POST /sms - Send SMS (requires authentication)
• GET /sms - Get all SMS (requires authentication)

Authentication in Swagger UI:
1. Click the "Authorize" button 🔒 in the top right corner
2. Enter Username and Password from add-on configuration
3. Click "Authorize" - now you can test protected endpoints