fix: 下载调整

wfc-api/wfc-api-system/src/main/java/org/wfc/system/api/factory/RemoteFileFallbackFactory.java

@@ -30,6 +30,11 @@ public class RemoteFileFallbackFactory implements FallbackFactory<RemoteFileServ
             {
                 return R.fail("Failed to upload file:" + throwable.getMessage());
             }
+
+            @Override
+            public R<byte[]> download(String filePath) {
+                return R.fail("Failed to download file:" + throwable.getMessage());
+            }
         };
     }
 }