MRF, Docs.Generator: Ensure code is loaded before checking it

lib/pleroma/web/activity_pub/mrf.ex

@@ -54,6 +54,8 @@ defmodule Pleroma.Web.ActivityPub.MRF do
   @required_description_keys [:key, :related_policy]
 
   def filter_one(policy, message) do
+    Code.ensure_loaded(policy)
+
     should_plug_history? =
       if function_exported?(policy, :history_awareness, 0) do
         policy.history_awareness()
@@ -188,6 +190,7 @@ defmodule Pleroma.Web.ActivityPub.MRF do
 
   def config_descriptions(policies) do
     Enum.reduce(policies, @mrf_config_descriptions, fn policy, acc ->
+      Code.ensure_loaded(policy)
       if function_exported?(policy, :config_description, 0) do
         description =
           @default_description