Function reconcile_series_indexes 

pub(crate) async fn reconcile_series_indexes(
    worker_id: u32,
    store: ObjectStore,
    region: MitoRegionRef,
    requested_bucket_width: Duration,
    now_ms: i64,
    purger: IndexFilePurger,
    enable_range_index: bool,
    allow_builds: bool,
) -> Result<ReconcileStats>

Reconciles indexes for one region snapshot, persists catalogs, then atomically publishes it.