common: resolve ping addresses with async DNS

The previous std::net::ToSocketAddrs call blocked the runtime during
DNS lookup. This change allows the server ping status to be resolved
asynchronously.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

common/src/lib.rs

@@ -25,12 +25,11 @@ pub struct ServerStatus {
 #[cfg(feature = "networking")]
 pub async fn ping_server(address: &str, port: u16) -> color_eyre::Result<ServerStatus> {
     use color_eyre::eyre::{bail, eyre};
-    use std::net::ToSocketAddrs;
     use std::time::Duration;
-    use tokio::net::UdpSocket;
+    use tokio::net::{lookup_host, UdpSocket};
 
-    let dest = format!("{}:{}", address, port)
-        .to_socket_addrs()?
+    let dest = lookup_host(format!("{}:{}", address, port))
+        .await?
         .next()
         .ok_or_else(|| eyre!("could not resolve address"))?;