Use ActivityPub.get_or_fetch_actor_by_url/2 instead of

directly Actors.get_actor_by_url

So that we can refresh actors when they're stale

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/graphql/schema/event.ex

@@ -8,7 +8,7 @@ defmodule Mobilizon.GraphQL.Schema.EventType do
   import Absinthe.Resolution.Helpers, only: [dataloader: 1]
   import Mobilizon.GraphQL.Helpers.Error
 
-  alias Mobilizon.{Actors, Addresses, Conversations, Events}
+  alias Mobilizon.{Actors, Addresses, Conversations}
   alias Mobilizon.GraphQL.Resolvers.{Event, Picture, Tag}
   alias Mobilizon.GraphQL.Schema