fix：tdengine问题

yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java

@@ -80,8 +80,8 @@ public class TDengineService {
     public Map<String, Object> getLatestDeviceData(Long id) {
         String tableName = "d_" + id;
 
-        // 修改SQL：对每个列单独使用last_row函数并指定别名
-        String sql = "SELECT last_row(ts) as ts, last_row(query_data) as query_data FROM besure." + tableName;
+        String sql = "SELECT ts, query_data FROM besure." + tableName +
+                " ORDER BY ts DESC LIMIT 1";
 
         try {
             return jdbcTemplate.queryForObject(sql, new RowMapper<Map<String, Object>>() {