refactor(health): remove HRV field and improve notification types

- Remove heart rate variability (hrv) field from health data interfaces and implementations
- Update default member name to Chinese localization
- Replace type assertions with proper enum types in notification schedulers

store/healthSlice.ts

@@ -13,7 +13,6 @@ export interface FitnessRingsData {
 
 export interface HealthData {
   activeCalories: number | null;
-  hrv: number | null;
   heartRate: number | null;
   activeEnergyBurned: number;
   activeCaloriesGoal: number;