Sentry Tunnel + Replay issue

With the /tunnel endpoint set up, Sentry doesn't appear to be able to save replays. Using compression on the replay payload does not appear to make a difference.

Check it out:

1. Create .env file cp .env.example .env
2. Edit the newly created .env with values for a Sentry project under your control.
3. npm run dev
4. Navigate browser to http://localhost:5173/sentry-example-page
5. Click the "Throw error!" button.
6. Open your Sentry dashboard and observe: error logged, no replay.