Make sure we return the right format for oban

lib/pleroma/workers/remote_fetcher_worker.ex

@@ -34,8 +34,11 @@ def perform(%Job{args: %{"op" => "fetch_remote", "id" => id} = args}) do
       {:error, :id_mismatch} ->
         {:discard, :id_mismatch}
 
-      _ ->
-        :error
+      {:error, _} = e ->
+        e
+
+      e ->
+        {:error, e}
     end
   end
 end