OpenTelemetry support

It seems proposed API may make it impossible to instrument HTTP servers, created by calling serve().

OpenTelemetry instrumentations use either import-in-the-middle to hook into classes and exported functions or (in case of fetch()) leverage diagnostics channel.

For a server, tracing via node:diagnostics_channel is not enough, because handler needs to be wrapped in AsyncLocalStorage that carries tracing context.

From the proposal, I see one possible injection point, which is wrapping serve on FetchServer.prototype. The question is, is this going to be possible? Is FetchServer globally available or exported? Does directly setting FetchServer.prototype.serve = wrapServe(FetchServer.prototype.serve) allows one to catch all requests that pass through every server created? Will one be able, with the help of import-in-the-middle, to hook into loading "http", "node:http", "node:serve" and wrap FetchServer.prototype.serve?

Hopefully, these will be addressed before the proposal lands.

Read the proposal sections covering FetchServer and serve() first, then compare them with the stated OpenTelemetry requirements around AsyncLocalStorage and node:diagnostics_channel. Done means the proposal clearly addresses whether FetchServer is exported or globally available, whether serve() can be wrapped for every created server, and whether the relevant Node modules can be hooked.