Building on #376, we want to flesh out the datastore to support out-of-order ingestion and data pruning by following the design in https://www.notion.so/rerunio/Arrow-Table-Design-cd77528c77ae4aa4a8c566e2ec29f84f

This work should be completely agnostic to how we actually break down objects/entities into components (i.e. agnostic to if a Point is a pos + radius).