Function wait_for_index_event_with_continuity 

fn wait_for_index_event_with_continuity(
    receiver: &Receiver<Result<Event>>,
    root: &Path,
    debounce: Duration,
    scan_options: &ScanOptions,
    continuity_lost: &AtomicBool,
) -> Result<WatchChangeSet, CliError>

Wait for one bounded event batch and preserve local queue-overflow uncertainty.