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

package.json

@@ -3,12 +3,19 @@
   "version": "1.0.0",
   "description": "IDC设备管理系统",
   "scripts": {
-    "start": "npm run start:backend & npm run start:frontend",
+    "start": "concurrently \"npm run start:backend\" \"npm run start:frontend\"",
     "start:backend": "cd backend && npm run dev",
     "start:frontend": "cd frontend && npm run dev",
     "install:all": "npm install && cd backend && npm install && cd ../frontend && npm install"
   },
-  "keywords": ["idc", "device", "management"],
+  "keywords": [
+    "idc",
+    "device",
+    "management"
+  ],
   "author": "",
-  "license": "MIT"
-}
+  "license": "MIT",
+  "devDependencies": {
+    "concurrently": "^9.2.1"
+  }
+}