Modules
A PostgreSQL implementation of Sourced.EventStore backed by your
application's Ecto repo.
Ecto schema for the sourced events table, and every query the adapter runs against it.
Migration creating the tables and triggers the event store reads and writes.
A dynamically started GenServer for listening to appended events and dispatching to the caller.
Ecto schema for the side table queries match tags against, and the queries run against it.