Replication Client: Use PagingInfo correctly

[mkysel]

          As a note - the `PagingInfo` of the `QueryGroupMessagesRequest` has an `id_cursor` that we could potentially convert into vector clock format here as a short-term hack. Unsure if we get subtle bugs without this, as the client expects to query from where it left off in the queue. In the long-term we need to do a bigger refactor to properly support vector clocks though, just making a note in case you run into bugs in the meantime

Originally posted by @richardhuaaa in #1214 (comment)