This adds `@octokit/plugin-retry`, which we use to retry transient HTTP
and network errors when making GitHub API requests.
This should address transient errors like this one:
https://github.com/astral-sh/uv/actions/runs/31519664724/job/93874168058?pr=19979
Excerpted:
```
Checking write access for actor 'woodruffw' on astral-sh/uv
GET /repos/astral-sh/uv/collaborators/woodruffw/permission - 500 with id UNKNOWN in 226ms
Actor 'woodruffw' is not permitted to run this action: Failed to verify permissions for 'woodruffw': other side closed
/home/runner/work/_actions/openai/codex-action/52fe01ec70a42f454c9d2ebd47598f9fd6893d56/dist/main.js:27910
throw new Error(message);
^
Error: Actor 'woodruffw' is not permitted to run this action: Failed to verify permissions for 'woodruffw': other side closed
at _Command.<anonymous> (/home/runner/work/_actions/openai/codex-action/52fe01ec70a42f454c9d2ebd47598f9fd6893d56/dist/main.js:27910:17)
```
(Note that the HTTP 500 is a red herring -- Octokit synthesizes a fake
HTTP 500 when it encounters an underlying network error.)
The core change here is just two lines, i.e. augmenting the Octokit
instance with the plugin and then using it. I've also added tests
backstopping the change.
Note: I picked `@octokit/plugin-retry` because it's an official part of
the Octokit SDK that GitHub provides.
Signed-off-by: William Woodruff <[email protected]>
William Woodruff
c385816875