feat(live_agg): Enable pre-aggregation flow

[vincent-pochet]

Context

This PR is part of the Pre-aggregation epic, it follows https://github.com/getlago/lago-api/pull/4277.

The main goal of this feature is to setup a complete aggregation pipeline that will be leveraged to compute the customer usage without re-querying the full set of events.

Description

This PR enables the live aggregation feature on the event processor side, making sure that the events_enriched_expanded table will be populated