Bug: 创建 Workflow 的 Response 类型与实际不匹配

#### 当前类型定义

https://github.com/coze-dev/coze-js/blob/0f37a1b03f4b616e4e0bb2671759bd83325b0989/packages/coze-js/src/resources/workflows/runs/runs.ts#L137-L144

#### 实际返回接口

[API 文档](https://www.coze.cn/open/playground/workflow_run)

以上，类型匹配不一致。。。

Start at packages/coze-js/src/resources/workflows/runs/runs.ts lines 137-144 and compare the declared response type with the workflow run API documentation linked in the issue. Confirm the actual response shape, update the type to match it, and verify that the SDK type and documented response are consistent.

Written by the indexing model from the issue text.