Why: A dropped subscription had no retry hint, and a reconnect had no test that the gap is filled from the cursor.
Evidence: The stream starts with retry: 1000. A live publish is delivered, and Last-Event-ID after an overflow replay skips events the client already has.
Impact: EventSource waits one second before reconnecting. Persisted events are unchanged.
Refs: feature/runstate-shell
Co-authored-by: Cursor <cursoragent@cursor.com>