fix: Export logger from sveltekit worker

[RulaKhaled]

Issue

The logger was missing from SvelteKit's worker environment exports, causing Sentry.logger to be null when deploying to Cloudflare Pages. Users experienced:

• Sentry.logger is null in production
• logger.info() throws access violations
• Works fine locally but fails in Cloudflare Pages deployment

Cloudflare Pages uses the worker runtime environment (not Node.js) when @sveltejs/adapter-cloudflare is configured which is why logger must be exported from there.

official Cloudflare Pages Functions documentation
https://developers.cloudflare.com/pages/framework-guides/deploy-a-svelte-kit-site/#functions-setup

[andreiborza]

Nice find!