bun: `Bun.serve` spans lack client address and protocol attributes

[isaacs]

Deno sets client.address, client.port (honoring x-forwarded-for) and network.protocol.name. Bun sets none. Bun exposes the peer through server.requestIP(request).

Work item. Thread the Server instance into wrapRequestHandler and set the three attributes, gated on dataCollection.userInfo the way Deno does.

[linear-code]

JS-3512