Assertion failed: !(handle->flags & UV_HANDLE_CLOSING), file src\win\async.c, line 76

This happens to both node and bun while trying to start dev server on windows.

```
$ npm run dev

> kotatsu@0.1.0 predev
> convex dev --until-success && convex dashboard

✔ Provisioned a dev deployment and saved its name as CONVEX_DEPLOYMENT to .env.local

Write your Convex functions in convex\
Give us feedback at https://convex.dev/community or support@convex.dev
View the Convex dashboard at https://dashboard.convex.dev/d/shocking-minnow-882

✔ 08:41:34 Convex functions ready! (11.93s)
Opening https://dashboard.convex.dev/d/shocking-minnow-882 in the default browser...
Assertion failed: !(handle->flags & UV_HANDLE_CLOSING), file src\win\async.c, line 76

$ bun dev
$ convex dev --until-success && convex dashboard
✔ Provisioned a dev deployment and saved its name as CONVEX_DEPLOYMENT to .env.local

Write your Convex functions in convex\
Give us feedback at https://convex.dev/community or support@convex.dev
View the Convex dashboard at https://dashboard.convex.dev/d/shocking-minnow-882

✔ 08:42:00 Convex functions ready! (5.29s)
Opening https://dashboard.convex.dev/d/shocking-minnow-882 in the default browser...
Assertion failed: !(handle->flags & UV_HANDLE_CLOSING), file src\win\async.c, line 76
```

Reproduce the failure with `npm run dev` and `bun dev`, focusing on the `convex dev --until-success && convex dashboard` entry point on Windows. Inspect the reported `src\win\async.c` line 76 assertion and compare behavior in both runtimes; done means the dashboard opens without the assertion.

Written by the indexing model from the issue text.