feat(device): 添加设备在线状态查询功能- 在DeviceV2Controller中新增getDeviceOnlineStatus接口，用于根据设备ID查询设备在线状态

- 引入DeviceStatusDTO和DeviceStatusIntegrationService以支持设备状态查询- 修改DeviceStatusDTO中的时间字段类型为Date，并调整JSON序列化格式- 在DeviceRepository中增加convertToEntityWithStatus方法，用于合并设备信息与状态信息
- 优化DeviceRepository中的getOnlineStatus方法，增加异常处理和降级机制- 完善设备在线状态查询的日志记录和错误处理逻辑

src/main/java/com/ycwl/basic/repository/DeviceRepository.java

@@ -7,7 +7,9 @@ import com.ycwl.basic.model.pc.device.entity.DeviceConfigEntity;
 import com.ycwl.basic.model.pc.device.entity.DeviceEntity;
 import com.ycwl.basic.utils.SnowFlakeUtil;
 import com.ycwl.basic.integration.device.service.DeviceIntegrationService;
+import com.ycwl.basic.integration.device.service.DeviceStatusIntegrationService;
 import com.ycwl.basic.integration.device.dto.device.DeviceV2DTO;
+import com.ycwl.basic.integration.device.dto.status.DeviceStatusDTO;
 import com.ycwl.basic.integration.common.manager.DeviceConfigManager;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.redis.core.RedisTemplate;
@@ -33,6 +35,8 @@ public class DeviceRepository {
     public static final String DEVICE_CACHE_KEY = "device:%s";
     @Autowired
     private DeviceConfigIntegrationService deviceConfigIntegrationService;
+    @Autowired
+    private DeviceStatusIntegrationService deviceStatusIntegrationService;
 
     /**
      * 将DeviceV2DTO转换为DeviceEntity
@@ -57,6 +61,30 @@ public class DeviceRepository {
         return entity;
     }
 
+    /**
+     * 将DeviceV2DTO和DeviceStatusDTO合并转换为DeviceEntity
+     */
+    private DeviceEntity convertToEntityWithStatus(DeviceV2DTO deviceDto, DeviceStatusDTO statusDto) {
+        if (deviceDto == null) {
+            return null;
+        }
+        
+        DeviceEntity entity = convertToEntity(deviceDto);
+        
+        // 合并状态信息
+        if (statusDto != null) {
+            // Boolean转Integer: true→1, false→0
+            entity.setOnline(statusDto.getIsOnline() != null && statusDto.getIsOnline() ? 1 : 0);
+            entity.setKeepaliveAt(statusDto.getLastActiveTime());
+            entity.setIpAddr(statusDto.getClientIP());
+        } else {
+            // 默认离线状态
+            entity.setOnline(0);
+        }
+        
+        return entity;
+    }
+
     public DeviceEntity getDevice(Long deviceId) {
         log.debug("获取设备信息, deviceId: {}", deviceId);
         DeviceV2DTO deviceDto = deviceIntegrationService.getDevice(deviceId);
@@ -144,10 +172,31 @@ public class DeviceRepository {
     }
 
     public DeviceEntity getOnlineStatus(Long deviceId) {
-        if (redisTemplate.hasKey(String.format(DEVICE_ONLINE_CACHE_KEY, deviceId))) {
-            return JacksonUtil.parseObject(redisTemplate.opsForValue().get(String.format(DEVICE_ONLINE_CACHE_KEY, deviceId)), DeviceEntity.class);
-        } else {
-            return null;
+        log.debug("获取设备在线状态, deviceId: {}", deviceId);
+        try {
+            // 首先获取设备基本信息
+            DeviceV2DTO deviceDto = deviceIntegrationService.getDevice(deviceId);
+            if (deviceDto == null) {
+                log.warn("设备不存在, deviceId: {}", deviceId);
+                return null;
+            }
+            
+            // 通过设备编号获取设备状态
+            DeviceStatusDTO statusDto = deviceStatusIntegrationService.getDeviceStatus(deviceDto.getNo());
+            
+            // 合并设备信息和状态信息
+            return convertToEntityWithStatus(deviceDto, statusDto);
+            
+        } catch (Exception e) {
+            log.error("获取设备在线状态异常, deviceId: {}", deviceId, e);
+            // 降级处理：尝试仅返回设备基本信息
+            try {
+                DeviceV2DTO deviceDto = deviceIntegrationService.getDevice(deviceId);
+                return convertToEntityWithStatus(deviceDto, null);
+            } catch (Exception fallbackException) {
+                log.error("降级获取设备信息也失败, deviceId: {}", deviceId, fallbackException);
+                return null;
+            }
         }
     }