fix: 设备最后上数时间，历史数据同步接口修改。

intc-modules/intc-tdengine/src/main/java/com/intc/tdengine/service/impl/DeviceSensorDataService.java

@@ -266,17 +266,18 @@ public class DeviceSensorDataService  implements IDeviceSensorDataService {
             return null;
         }
         try {
-            Integer exists = deviceSensorDataMapper.checkTableExists(serialNum);
-            if (exists == null || exists == 0) {
-                return null;
-            }
             DeviceSensorData latest = deviceSensorDataMapper.getLatestReportTime(serialNum);
             if (latest == null) {
                 return null;
             }
             return latest.getCreateTime() != null ? latest.getCreateTime() : latest.getTime();
         } catch (Exception e) {
-            log.warn("查询设备最新上数时间失败: serialNum={}, error={}", serialNum, e.getMessage());
+            String errorMsg = e.getMessage();
+            if (errorMsg != null && errorMsg.toLowerCase().contains("not exist")) {
+                log.debug("设备TDengine子表不存在或无数据: serialNum={}", serialNum);
+            } else {
+                log.warn("查询设备最新上数时间失败: serialNum={}, error={}", serialNum, errorMsg);
+            }
             return null;
         }
     }