Feed integration

A subscribing contract reads the latest round for a ticker, receiving the price, the round number, the publication timestamp, the number of in-band signers and a freeze flag.

Consumers must treat the freeze flag as terminal for the round: there is no last-good-price fallback exposed, because exposing one would recreate the failure this protocol exists to remove.

No feed is live and no subscriber is claimed. Subscription terms are not published until the contracts are deployed and audited.