feat: adapter-vercel o11y

[Rich-Harris]

This is just #13674, but an internal branch (not a fork) so that pkg.pr.new works correctly, which I need in order to test this

[github-actions]

pnpm add https://pkg.pr.new/@sveltejs/adapter-auto@13679
pnpm add https://pkg.pr.new/@sveltejs/adapter-cloudflare@13679
pnpm add https://pkg.pr.new/@sveltejs/adapter-node@13679
pnpm add https://pkg.pr.new/@sveltejs/adapter-static@13679
pnpm add https://pkg.pr.new/@sveltejs/adapter-netlify@13679
pnpm add https://pkg.pr.new/@sveltejs/adapter-vercel@13679
pnpm add https://pkg.pr.new/@sveltejs/amp@13679
pnpm add https://pkg.pr.new/create-svelte@13679
pnpm add https://pkg.pr.new/@sveltejs/enhanced-img@13679
pnpm add https://pkg.pr.new/@sveltejs/kit@13679
pnpm add https://pkg.pr.new/@sveltejs/package@13679

[changeset-bot]

🦋 Changeset detected

Latest commit: 57064d8

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	Minor

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[Rich-Harris]

it works!