readUntil method
- ChatId chatId,
 - ChatItemId untilId
 
Marks the specified Chat as read until the provided ChatItemId for the authenticated MyUser.
Implementation
Future<void> readUntil(ChatId chatId, ChatItemId untilId) async {
  Log.debug('readUntil($chatId, $untilId)', '$runtimeType');
  await Backoff.run(
    () async {
      await _graphQlProvider.readChat(chatId, untilId);
    },
    retryIf: (e) => e.isNetworkRelated,
    retries: 10,
  );
}