Made Sensor class generic with SensorType, Made RWSensor extend the g…

…eneric Sensor class. This should resolve the type checking errors while maintaining the existing functionality.

src/sunsynk/rwsensors.py

@@ -17,7 +17,7 @@
 
 
 @attrs.define(slots=True, eq=False)
-class RWSensor(Sensor):
+class RWSensor(Sensor[SensorType]):
     """Read & write sensor."""
 
     min: SensorType | NumType = 0

src/sunsynk/sensors.py

@@ -1,7 +1,7 @@
 """Sensor classes represent modbus registers for an inverter."""
 
 from __future__ import annotations
-from typing import TypeVar
+from typing import TypeVar, Generic
 
 import logging
 
@@ -19,11 +19,11 @@
 
 _LOGGER = logging.getLogger(__name__)
 
-SensorType = TypeVar("SensorType", bound="Sensor")
+SensorType = TypeVar('SensorType', bound='Sensor')
 
 
 @attrs.define(slots=True, eq=False)
-class Sensor:
+class Sensor(Generic[SensorType]):
     """Sunsynk sensor."""
 
     # pylint: disable=too-many-instance-attributes