Test peer: no bail! in expression position

Newer compilers warn of the macro's trailing semicolon there, and CI fails
on warnings.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

crates/integration-tests/src/test_peer.rs

@@ -86,7 +86,7 @@ impl TestPeer {
     pub async fn recv_within(&mut self, wait: Duration) -> Result<Message> {
         match tokio::time::timeout(wait, self.recv_untimed()).await {
             Ok(message) => message,
-            Err(_) => bail!("no message from the server within {wait:?}"),
+            Err(_) => Err(eyre::eyre!("no message from the server within {wait:?}")),
         }
     }
 
@@ -130,7 +130,7 @@ impl TestPeer {
             match self.recv().await? {
                 Message::Notification(n) => return Ok(n),
                 Message::KeepAlive => {}
-                other => bail!("expected NOTIFICATION, got {other:?}"),
+                other => return Err(eyre::eyre!("expected NOTIFICATION, got {other:?}")),
             }
         }
     }