Function prefetch_stake_table_events 

pub(crate) async fn prefetch_stake_table_events(
    fetcher: &Fetcher,
    l1_client: &L1Client,
    l1_genesis: &L1BlockInfo,
    stake_table_contract: Option<Address>,
) -> Result<()>

Scans the whole L1 contract history when nothing is persisted yet, keeping every bootstrap_epoch_window step bounded to one epoch instead of loading that scan onto the first step, which silently downgrades the node to a stale epoch window when it exceeds its timeout. Untimed: an unreachable L1 panics after l1_events_max_retry_duration.