fix(iroh-metrics): Add the bind addr in errors for bind failures (#2511)

## Description

When a bind fails you get a generic error that is hard to track down
for users.  Adding the bind address to the error will help a lot.

## Breaking Changes

none

## Notes & open questions

Fixes #2507.

## Change checklist

- [x] Self-review.
- [x] Documentation updates following the [style
guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text),
if relevant.
- [x] Tests if relevant.
- [x] All breaking changes documented.

iroh-metrics/src/service.rs

@@ -1,6 +1,6 @@
 use std::net::SocketAddr;
 
-use anyhow::{anyhow, Result};
+use anyhow::{anyhow, Context, Result};
 use hyper::service::service_fn;
 use hyper::{Request, Response};
 use tokio::net::TcpListener;
@@ -13,7 +13,9 @@ type BytesBody = http_body_util::Full<hyper::body::Bytes>;
 /// Start a HTTP server to report metrics.
 pub async fn run(metrics_addr: SocketAddr) -> Result<()> {
     info!("Starting metrics server on {metrics_addr}");
-    let listener = TcpListener::bind(metrics_addr).await?;
+    let listener = TcpListener::bind(metrics_addr)
+        .await
+        .with_context(|| format!("failed to bind metrics on {metrics_addr}"))?;
     loop {
         let (stream, _addr) = listener.accept().await?;
         let io = hyper_util::rt::TokioIo::new(stream);