Cleanup august dataclasses (#119938)

homeassistant/components/august/config_flow.py

@@ -66,7 +66,7 @@ async def async_validate_input(
     }
 
 
-@dataclass
+@dataclass(slots=True)
 class ValidateResult:
     """Result from validation."""
 

homeassistant/components/august/sensor.py

@@ -58,20 +58,13 @@ def _retrieve_linked_keypad_battery_state(detail: KeypadDetail) -> int | None:
 _T = TypeVar("_T", LockDetail, KeypadDetail)
 
 
-@dataclass(frozen=True)
-class AugustRequiredKeysMixin(Generic[_T]):
+@dataclass(frozen=True, kw_only=True)
+class AugustSensorEntityDescription(SensorEntityDescription, Generic[_T]):
     """Mixin for required keys."""
 
     value_fn: Callable[[_T], int | None]
 
 
-@dataclass(frozen=True)
-class AugustSensorEntityDescription(
-    SensorEntityDescription, AugustRequiredKeysMixin[_T]
-):
-    """Describes August sensor entity."""
-
-
 SENSOR_TYPE_DEVICE_BATTERY = AugustSensorEntityDescription[LockDetail](
     key="device_battery",
     entity_category=EntityCategory.DIAGNOSTIC,