Data source inventory, provenance rules, and refresh expectations

The data-sources route is a provenance page. It explains what kinds of feeds, official sources, market snapshots, and manually curated inputs can appear in the service and how those inputs are expected to age or refresh across the day.

It is especially important when a board looks sparse or downgraded, because the reader can see that publication depends on source completeness and freshness rather than pure model appetite.

What readers can verify here

Related context

More detailed tables, filters, and navigation become available after the interactive app finishes loading.