Relay repro

To repro:

Clone this repo and put an OPENAI_API_KEY in .dev.vars. Then,

pnpm install
pnpm dev

(should be running on port 8787)

Then, clone https://github.com/openai/openai-realtime-console.git and create a .env file with

REACT_APP_LOCAL_RELAY_SERVER_URL=http://localhost:8787

and

pnpm install
pnpm build
pnpm start

(note you do not need to run the relay server — that is replaced by the worker).

In the browser, open up a session, click connect, and start talking. After ~ 40s, you'll see that the connection disconnects in Workerd.