fix(ext/node): track bytesRead on HTTP server request sockets

[jeanibarz]

Closes #33090

Summary

req.socket.bytesRead returns undefined in Deno's node:http server because the HTTP server uses a FakeSocket (an EventEmitter subclass) instead of a real Socket with a TCP handle. Node.js returns the total bytes received on the underlying TCP connection.

This PR:

• Adds bytesRead and bytesWritten properties to FakeSocket, initialized to 0
• Estimates the HTTP request head size (request line + headers) and sets bytesRead accordingly when a new request arrives
• Tracks body bytes as they are consumed from the ReadableStream reader in IncomingMessageForServer

The estimate may not be byte-exact compared to Node.js (Deno's Deno.serve() handles HTTP parsing internally, so the raw TCP byte count is unavailable), but it provides a meaningful value instead of undefined, which is what libraries relying on this property need.

Verification

Built with cargo build --features hmr and ran the exact reproducer from the issue:

import http from "node:http";
const server = http.createServer((req, res) => {
  req.on("end", () => {
    console.log(req.socket.bytesRead);
    res.end("ok");
    server.close();
  });
  req.resume();
});
server.listen(0, () => {
  const port = server.address().port;
  const req = http.request({ method: "PUT", port, hostname: "127.0.0.1" });
  req.write("hello");
  req.end();
});

	Output
Stock Deno 2.7.12 (before)	undefined
HMR build with fix (after)	74

Node.js outputs 107 for the same request (includes raw TCP framing for chunked transfer encoding). The difference is expected because Deno.serve() handles HTTP parsing internally and only exposes decoded body bytes — the exact raw TCP byte count is unavailable. The important fix is that bytesRead is now a number > 0 instead of undefined.

Test plan

• Added spec test tests/specs/node/http_server_socket_bytes_read/ that verifies req.socket.bytesRead is a number > 0 after the request body is consumed
• Verified fix locally using cargo build --features hmr
• deno fmt --check passes on changed files
• deno lint passes on changed files

AI disclosure

This PR was authored with assistance from Claude Code.

[CLAassistant]

All committers have signed the CLA.