Thanks to the developers for this great software!
This is a "would be nice to have" feature request to add a flag to the JSON-RPC/GraphQL query input have Geth search for the events in reverse chronological order and only return the most recent log (or the batch from that block).
Unless I'm mistaken, at the moment it is only possible to construct queries that return all of the events for a given filter.
If you have a case where you only want the most recent event, but you don't know when it occurred, you still need to get back all of the events and filter (potentially not ideal on a client machine).
See also:
https://ethereum.stackexchange.com/questions/41976/how-to-get-only-latest-log-from-my-event https://ethereum.stackexchange.com/questions/8699/how-to-get-only-latest-logged-event-via-web3-api
Thanks,
Lee