Completes the advanced query and lifecycle surface with cross-stream correlation, schema upcasting for event migrations, payload transforms, tombstone deletion, and cursor pagination.
v0.4.02026-06-12
·Cross-stream queries: correlate events across multiple streams by causation/correlation ID
·Upcasters: migrate old event payloads to current schema version at read time
·Transforms: apply stateless payload mutations without mutating the log
·Soft deletion via purge_event: removes events from read path (tombstone semantics, DV-002)
·Cursor-based pagination for large result sets via read_cursor / advance_cursor