Event IDs or names in Event aggregation server.log output

When reviewing `server.log` output for Event aggregations, the query being executed is `query-1` because it is ephemeral, which makes it difficult to tie `server.log` entries back to specific Events:


Including the Event ID or the Event name in the `server.log` output will improve troubleshooting time and give context to the issue, especially in an environment with many enabled Events.

## Your Environment

* Graylog Version: Graylog Cloud 5.2.1 (387)