refactor(dpop): apply clippy

src/main.rs

@@ -1396,13 +1396,13 @@ async fn run() -> Result<(), Box<dyn std::error::Error>> {
     // Installs the recorder BEFORE the main listener starts serving so
     // the first request's counter increments are captured (recorder
     // install is racy vs first emit — order matters).
-    if let Some(metrics_addr) = config.metrics_listen {
-        if let Err(err) = oxicloud::interfaces::metrics::spawn(metrics_addr).await {
-            // Fail loudly: operators asked for metrics; not surfacing
-            // this would hide a misconfigured scrape endpoint.
-            tracing::error!("Prometheus /metrics setup failed: {err}");
-            return Err(err);
-        }
+    if let Some(metrics_addr) = config.metrics_listen
+        && let Err(err) = oxicloud::interfaces::metrics::spawn(metrics_addr).await
+    {
+        // Fail loudly: operators asked for metrics; not surfacing
+        // this would hide a misconfigured scrape endpoint.
+        tracing::error!("Prometheus /metrics setup failed: {err}");
+        return Err(err);
     }
 
     let socket = make_socket(&addr, reuse_port)?;