plugin导入openapi格式json，确认环节报错： invalid plugin openapi3 document : invalid components: schema "DocumentContent": extra sibling fields: [has schema]

**Describe the bug**

plugin导入openapi格式json确认环节报错 invalid plugin openapi3 document : invalid components: schema "DocumentContent": extra sibling fields: [has schema]。

完全相同的json，coze平台非开源的就可以导入成功。

**To Reproduce**

插件-新建-导入-复制json文本：

{"openapi":"3.0.0","info":{"title":"工作流插件集合 API","description":"工作流插件集合 API 支持 Coze、n8n、Dify 等平台的工作流插件集合 API，提供统一的接口来管理各种工作流工具。主要功能 1-📋 插件管理 2-📄 飞书文档插件 3-📊 飞书表格插件 认证方式所有 API 请求都需要包含有效的 API Key：Authorization: Bearer your-api-key","version":"1.0.0"},"paths":{"/health/":{"get":{"tags":["健康检查"],"summary":"Health Check","description":"健康检查","operationId":"health_check","responses":{"200":{"description":"Successful Response","content":{"application/json":{"schema":{"$ref":"#/components/schemas/HealthCheckResponseSchema"}}}}}}},"/api/feishu_docs/create":{"post":{"tags":["飞书文档"],"summary":"Create Document","description":"创建文档","operationId":"create_document","requestBody":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/DocumentCreateRequest"}}},"required":true},"responses":{"200":{"description":"Successful 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**Expected behavior**

期待导入成功，coze官方平台就可以导入成功，说明json本身没问题，这个就是fastapi框架导出的直接不是手动拼的不太会有问题。
**Screenshots**

以下分别是开源版导入失败、coze官方平台导入成功的截图。

If applicable, add screenshots to help explain your problem.

**Version:**

Please provide the version of {project_name} you are using.

**Environment:**

The output of `go env`.

**Additional context**

Add any other context about the problem here.