[#2301] Proper handling of User.is_discoverable: users appear in in-service search but are hidden from external services like search bots.

test/pleroma/web/admin_api/search_test.exs

@@ -203,6 +203,7 @@ defmodule Pleroma.Web.AdminAPI.SearchTest do
       assert count == 1
     end
 
+    # Note: as in Mastodon, `is_discoverable` doesn't anyhow relate to user searchability
     test "it returns non-discoverable users" do
       insert(:user)
       insert(:user, is_discoverable: false)