feat(hostd): varlink interfaced host controller to manage machine configuration and boot mgmt

hostd/src/machine.rs

@@ -27,9 +27,11 @@ pub async fn describe(
         .await
         .unwrap();
 
-    let bytes = manager.machine_id().await.unwrap();
-    // convert bytes to hex string
-    let machine_id = bytes
+    let machine_id = manager
+        .machine_id()
+        .await
+        .unwrap()
+        // convert bytes to hex string
         .iter()
         .map(|&b| format!("{:02x}", b))
         .collect::<String>();