docs(task): 更新任务通信规则文档并添加任务注册描述

添加任务注册信息的描述字段到tasker_mapper.json
完善WebSocket通信机制文档，补充核心组件说明
修正属性同步机制中的空指针问题
优化代码格式和注释

client/src/main/java/com/ecep/contract/task/CompanyCustomerRebuildFilesTasker.java

@@ -15,20 +15,21 @@ public class CompanyCustomerRebuildFilesTasker extends Tasker<Object> implements
     @Getter
     @Setter
     private CompanyCustomerVo companyCustomer;
-    
+
     @Getter
+    @Setter
     protected boolean filesUpdated = false;
-    
+
     @Override
     public String getTaskName() {
         return "CompanyCustomerRebuildFilesTasker";
     }
-    
+
     @Override
     public void updateProgress(long current, long total) {
         super.updateProgress(current, total);
     }
-    
+
     @Override
     protected Object execute(MessageHolder holder) throws Exception {
         updateTitle("重建客户文件");