feat: 使用concurrently实现跨平台同时启动前后端

refactor(models): 优化模型初始化逻辑避免重复同步
refactor(OperationLog): 将createdAt索引改为operateTime
docs: 添加一次性启动解决方案文档

backend/models/OperationLog.js

@@ -81,8 +81,8 @@ const OperationLog = sequelize.define('OperationLog', {
     { fields: ['userId'] },
     { fields: ['action'] },
     { fields: ['module'] },
-    { fields: ['createdAt'] },
-    { fields: ['userId', 'createdAt'] }
+    { fields: ['operateTime'] },
+    { fields: ['userId', 'operateTime'] }
   ]
 });
 

backend/models/ticketIndex.js

@@ -170,9 +170,7 @@ const initAssociations = () => {
 
 const initializeModels = async () => {
   try {
-    await sequelize.sync({ alter: true });
-    console.log('工单相关数据表同步完成');
-
+    // 仅初始化关联，不再次同步表结构（避免与server.js中的sync冲突）
     initAssociations();
     await initDefaultFaultCategories();