Entity Runtime 0.30.3

Changed

• entity-eventlog, and the Eventlog features of entity-cli, entity-sqlite and entity-postgres, depend on Eventlog's 0.8.3 tag instead of 0.8.1. With the file provider, a recorded batch now costs time linear in its members, as it already did on SQLite: the handle hashes each batch blob once instead of once per member read. PostgreSQL handles make the same change. No API or on-disk format changes.