Power cut off detector

The primary feature is to detect grid power-off events. There are no reliable devices on the market that can cope with this. A mobile phone with the app installed should be plugged into a power outlet. If grid power goes down, the application sends a message via a Telegram bot. Currently implemented features: send telegram bot message when power is off or on (supports multiple chat IDs) error logging for failed Telegram notifications with 3 retry attempts per chat ID visual logs tab for monitoring power events and errors