Every data feed behind both models: its latest value, the observation date, the source, its provenance flag and its freshness window. A failed refresh keeps the last-good value and flags it Stale — the models keep solving. The assembled snapshot is a public download for anyone to use.
Refresh cadence: a platform cron rebuilds the snapshot daily (06:15 UTC); monthly and quarterly series simply update when new observations publish. API keys live in the deploy secret store and are never exposed to the browser or committed to the repo.