feat(lifecycle): Return to menu if loading failed

If an asynchronous load fails, return to the menu instead of leaving
card10 in a state where no app is running.

Ref: #228

epicardium/modules/lifecycle.c

@@ -402,8 +402,13 @@ void vLifecycleTask(void *pvParameters)
 			}
 		}
 
-		do_load((struct load_info *)&async_load);
+		ret = do_load((struct load_info *)&async_load);
 
 		mutex_unlock(&core1_mutex);
+
+		if (ret < 0) {
+			LOG_ERR("lifecycle", "Error loading payload: %d", ret);
+			return_to_menu();
+		}
 	}
 }