refactor(设备字段): 移除冗余字段并更新必填字段验证逻辑

移除设备模型中的owner、department和assetId字段，这些字段不再使用
更新设备导入接口的必填字段验证逻辑，使用硬编码的必填字段列表以保持前后端一致

backend/initDeviceFields.js

@@ -143,39 +143,12 @@ const defaultDeviceFields = [
     visible: true,
     isSystem: false
   },
-  {
-    fieldName: 'owner',
-    displayName: '责任人',
-    fieldType: 'string',
-    required: false,
-    order: 15,
-    visible: true,
-    isSystem: false
-  },
-  {
-    fieldName: 'department',
-    displayName: '所属部门',
-    fieldType: 'string',
-    required: false,
-    order: 16,
-    visible: true,
-    isSystem: false
-  },
-  {
-    fieldName: 'assetId',
-    displayName: '资产编号',
-    fieldType: 'string',
-    required: false,
-    order: 17,
-    visible: true,
-    isSystem: false
-  },
   {
     fieldName: 'brand',
     displayName: '品牌',
     fieldType: 'string',
     required: false,
-    order: 18,
+    order: 15,
     visible: true,
     isSystem: false
   }