<!-- TIER:1 -- Building Syncs A sync (Celigo Data Ingestion) replicates data from one source application into a data warehouse. It pairs a source connection with a destination (a warehouse connection plus a database and schema), and its datasets choose which tables or objects it copies, which columns, and how each table loads. The first run backfills history from ; later runs are incremental. Runs happen on a cron schedule or on demand, and each one leaves a read-only sync job with per-table children, run errors , and events for schema drift. A sync is not a flow. It has no steps, mappings, h…