Add comments under events to activities

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

lib/graphql/schema/activity.ex

@@ -5,7 +5,7 @@ defmodule Mobilizon.GraphQL.Schema.ActivityType do
   use Absinthe.Schema.Notation
 
   alias Mobilizon.Actors.{Actor, Member}
-  alias Mobilizon.Discussions.Discussion
+  alias Mobilizon.Discussions.{Comment, Discussion}
   alias Mobilizon.Events.Event
   alias Mobilizon.Posts.Post
   alias Mobilizon.Resources.Resource
@@ -51,6 +51,9 @@ defmodule Mobilizon.GraphQL.Schema.ActivityType do
       %Discussion{}, _ ->
         :discussion
 
+      %Comment{}, _ ->
+        :comment
+
       %Actor{type: :Group}, _ ->
         :group