Repos in the same org not able to run `gh stack submit`

Last Friday, I was testing stacked PRs for our org, and I was able to submit two stacked PRs in `repo-a`. This week, I am able to submit stacked PRs in `repo-b` and `repo-c` within the same org, but not in `repo-a`. I am getting the error:

> $ gh stack submit
> Checking stack state...
> ⚠ Stacked PRs are not enabled for this repository
> ? Would you still like to create regular PRs?

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I tried the following API calls to diagnose:
`gh api -i 'repos/MyOrg/repo-b/stacks?per_page=1'` - returns `200`
`gh api -i 'repos/MyOrg/repo-a/stacks?per_page=1'` - returns `404`

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`gh`: `2.97.0`
`gh-stack`: `0.1.0`

首先在 `repo-a` 中复现 `gh stack submit`，并比较针对 `repo-a` 和 `repo-b` 的 `gh api` 响应。在 gh-stack 入口点跟踪仓库 stack 状态检查，然后确定 endpoint 返回 404 的原因，并验证对于同一组织中的仓库，提交行为是否正确。

由索引模型根据 Issue 内容生成。