- Add three Rails Event Store append scenarios to compare its throughput against En57: - res-append-stream-any: single-thread append with expected_version :any. - res-concurrent-append-non-conflicting-streams: concurrent append to distinct streams. - res-concurrent-append-conflicting-streams: concurrent append to one stream with integer expected_version, retrying on conflict. - Pull in rails_event_store and rails as dependencies. - Seed the RES event_store_events schema from a dedicated SQL dump registered in database.toml.