Merge pull request 'ReceiverWorker: Make sure non-{:ok, _} is returned as {:error, …}' (#753) from Oneric/akkoma:receive-worker-return into develop

Reviewed-on: #753

lib/pleroma/workers/receiver_worker.ex

@@ -14,7 +14,8 @@ def perform(%Job{args: %{"op" => "incoming_ap_doc", "params" => params}}) do
     else
       {:error, :origin_containment_failed} -> {:discard, :origin_containment_failed}
       {:error, {:reject, reason}} -> {:discard, reason}
-      e -> e
+      {:error, _} = e -> e
+      e -> {:error, e}
     end
   end
 end