also send misskey quote data

app/serializers/activitypub/note_serializer.rb

@@ -12,6 +12,7 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
              :conversation
 
   attribute :quote_uri, if: -> { object.quote? }
+  attribute :misskey_quote, key: :_misskey_quote, if: -> { object.quote? }
 
   attribute :content
   attribute :content_map, if: :language?
@@ -156,6 +157,8 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
     ActivityPub::TagManager.instance.uri_for(object.quote) if object.quote?
   end
 
+  alias misskey_quote quote_uri
+
   def local?
     object.account.local?
   end