Ecotone comes with Prooph Event Store integration. This is well known and stable solution providing event storage over databases like Postgres, MySQL or MariaDB.
Ecotone provides Event Sourced Aggregates, which are stored as series of events.
Thanks to that we will be able to have the whole history of what happened with specific Aggregate.
And build up projections, that targets specific view, in order to keep our code simple, even with really complicated queries. This divide Commands from Queries (CQRS).