chrome://inspect shows Cloudflare Worker as remote target, but Performance tab of chrome's native devtools don't work

### What versions & operating system are you using?

Wrangler 4.41.0, mac os latest

### Please provide a link to a minimal reproduction

any worker

### Describe the Bug

1. Go to `chrome://inspect` with Wrangler running
2. It shows you an option to inspect a Cloudflare Worker — great!
3. Then you try to use it — and the *Performance tab* of devtools doesn't work, no JavaScript VM instance shows up in menu, etc.

### Please provide any relevant error logs

_No response_

Reproduce with any Worker running under Wrangler 4.41.0, then open chrome://inspect and launch the target in Chrome DevTools. Investigate the Performance tab and JavaScript VM selector; done means the Worker exposes a usable VM instance and Performance recording works.

Written by the indexing model from the issue text.