The KE110 room thermostat has a humidity sensor, but the humidity data is not exposed through the thermostat module.

The humiditysensor.py module already exists and reads current_humidity
from sys_info, but the thermostat.py module only loads:

• TemperatureControl
• TemperatureSensor

Request: Add HumiditySensor module to thermostat devices so the
current_humidity attribute is exposed to Home Assistant.

Device: KE110 Room Thermostat (connected via KH100 hub)
Current behavior: Only temperature and heating status exposed
Expected behavior: Humidity % also exposed (as attribute or separate sensor)