fix(backend): RBTの修正 (#14621)

* fix(backend): 絵文字の変換処理が不十分なのを修正

* enhance: リアクションバッファリングが無効になったら即bakeするように

* attempt to fix test

* fix

packages/backend/src/core/GlobalEventService.ts

@@ -241,7 +241,7 @@ export interface InternalEventTypes {
 	avatarDecorationCreated: MiAvatarDecoration;
 	avatarDecorationDeleted: MiAvatarDecoration;
 	avatarDecorationUpdated: MiAvatarDecoration;
-	metaUpdated: MiMeta;
+	metaUpdated: { before?: MiMeta; after: MiMeta; };
 	followChannel: { userId: MiUser['id']; channelId: MiChannel['id']; };
 	unfollowChannel: { userId: MiUser['id']; channelId: MiChannel['id']; };
 	updateUserProfile: MiUserProfile;