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

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.

Start at Bun.serve's wrapRequestHandler and compare the existing Deno implementation for client address, port, and network protocol attributes. Inspect Server.requestIP(request) and dataCollection.userInfo, then verify that the three attributes are present only under the same gate used by Deno.

索引モデルが issue の本文から書いたものです。