Enhanced Records List and the Promotion Mechanic — the iterative-enrichment loop closes

augment-it now has a checkpoint surface between enrichment rounds. You finish a pass of LLM-driven enrichment, open Enhanced Records, see every record in one place with its accumulated columns, and click Promote — the system snapshots the current state into a new canonical record set under a deterministic, versioned name, archives the predecessors, and gives you a clear success message with a one-click path back to the start of the arc to author the next round. record_uuid follows each record across every promotion so a single conceptual record stays traceable from original CSV through every round of refinement. This is the loop the walking skeleton has been building toward: enrich, triage, checkpoint, re-enrich on a cleaner base.