Change power_sensor input from single entity to multiple selector with
empty list default. This allows the trigger to gracefully handle the
case when no power sensor is configured (empty list = trigger skipped).
Updated all power_sensor checks from "is not none" to "length > 0".
- Estimated end time in start notification (e.g., "Завершение: ~14:30")
- Pause/Resume notifications when cycle is paused or resumed
- Power consumption monitoring with energy tracking per cycle
- Energy report appended to completion notification
- Debug notifications toggle for troubleshooting
