fix: stop adapter-vercel tracing from globbing the whole drive on Windows

[Nic-Polumeyv]

create_function_bundle traces with base set to the filesystem root. nft treats any absolute-looking string with a dynamic segment as an asset glob, and the server output has URL strings like

`/${app_dir}/routes${route_id}`   // runtime/pathname.js

On Linux this resolves to /<*>/routes, the parent directory is '', the stat fails and nothing happens. On Windows it resolves to D:\<*>\routes, the parent D: stats fine, and nft runs glob('D:/**/*/routes') over the whole drive, which never finishes once it hits pagefile.sys.

nft also evaluates process.cwd() as base unless told otherwise, so path.join(process.cwd(), 'asset.txt') was traced from / and never bundled.

nft calls ignore with the glob relative to base before walking, and a base-rooted glob is **\*\routes. The cwd case has a regression test; the root-glob case can't fire on Linux for the reason above.

Fixes #16963. Supersedes #16964. Related: vercel/nft#609.

[pkg-svelte-dev]

Install the latest version of @sveltejs/kit from 1f04ce6:

pnpm add https://pkg.svelte.dev/@sveltejs/kit/c/1f04ce6ab7a0ed5d2fa7c777217cc60089358c13

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/kit/pr/16972

[changeset-bot]

🦋 Changeset detected

Latest commit: 1f04ce6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@sveltejs/adapter-vercel	Patch

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[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-kit-16972-svelte.vercel.app/

[manvankaliber]

I am weirdly very happy to know I wasn't doing anything wrong. Thank you very much for getting this patch in this fast!