升级fastjson至2.0.57修复<=1.2.83任意代码执行漏洞，调整离线设备告警阈值

Co-Authored-By: Claude Code <noreply@anthropic.com>

pom.xml

@@ -70,10 +70,12 @@
             <version>${hutool.version}</version>
         </dependency>
 
+        <!-- fastjson 2.x 兼容包：保留 com.alibaba.fastjson 包名，底层为 fastjson2，
+             默认关闭 autoType，修复 fastjson <= 1.2.83 任意代码执行漏洞 -->
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.83</version>
+            <version>2.0.57</version>
         </dependency>
 
         <dependency>

src/main/java/com/topsail/scheduletask/task/CheckRabbitMqScheduleTask.java

@@ -126,7 +126,7 @@ public class CheckRabbitMqScheduleTask {
                     }
                     //2.查询设备离线数量
                     List<DeviceOnlineInfo> offlineDevices = topsailTransmitLogDao.getOfflineDevice(imeiList, focusDeviceOnline.getProjectId());
-                    if (offlineDevices != null && offlineDevices.size() > 0) {
+                    if (offlineDevices != null && offlineDevices.size() > 2) {
                         //将离线的设备号码转成json字符串
                         Map<String, String> offlineDeviceMap = offlineDevices.stream()
                                 .collect(Collectors.toMap(DeviceOnlineInfo::getImei, DeviceOnlineInfo::getOfflineTime));