[feature] Return N messages instead of one in cache mode recovery

[FZambia]

There was a feature request in Telegram group. Requires some research.

[FZambia]

After the first round of looking – it seems recovery cache mode is not very good fit here due to its semantics. I.e. in channels with cache mode we can assume that only the latest message is useful, with possibility to drop intermediary. If we extend it to N latest - this breaks the mentioned property.

Will try to look from the another perspective - as part of the stream recovery mode.