Fix power reporting of Centralite 4257050-RZHAC (#3236)

Co-authored-by: Koen Kanters <koenkanters94@gmail.com>

lib/extension/homeassistant.js

@@ -1405,6 +1405,7 @@ const mapping = {
     'E12-N1E': [cfg.light_brightness_colortemp_colorxy],
     '4040B': [cfg.sensor_power, switchWithPostfix('l1'), switchWithPostfix('l2')],
     '3460-L': [cfg.sensor_action, cfg.sensor_temperature, cfg.sensor_battery],
+    '4257050-RZHAC': [cfg.switch, cfg.sensor_power],
     '27087-03': [cfg.switch, cfg.sensor_battery],
 };