refactor: moved sensor data service

src/main/java/com/backend/glowhouse/service/SensorDataService.java

 package com.backend.glowhouse.service;
 
 import com.backend.glowhouse.model.SensorData;
-import com.backend.glowhouse.repository.SensorDataRepository;
+import com.backend.glowhouse.repository.device.SensorDataRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;