Reproduction

1. Create a running run with existing event history.
2. Start smithers events <run-id> --watch --raw --json without --since.
3. Observe that every historical event is emitted before new events are tailed.

Observed

Watch mode initializes its cursor at -1 and runs normal history pagination, replaying the full event log before polling.

Expected

--watch should start at the current event cursor by default and only emit events appended after startup. Users should be able to opt into full history replay explicitly.