receiver_worker: log unecpected errors

This can't handle process crash errors
but i hope those get a stacktrace logged by default

lib/pleroma/workers/receiver_worker.ex

@@ -34,9 +34,11 @@ def perform(%Job{args: %{"op" => "incoming_ap_doc", "params" => params}}) do
         {:discard, :invalid}
 
       {:error, _} = e ->
+        Logger.error("Unexpected AP doc error: #{inspect(e)} from #{inspect(params)}")
         e
 
       e ->
+        Logger.error("Unexpected AP doc error: (raw) #{inspect(e)} from #{inspect(params)}")
         {:error, e}
     end
   end