support.supper.feed.getCreatorFeed

Get a creator's verified cross-repo support feed: support.supper.feed.post records authored on every supporter repo whose recipient is the named creator, newest first. Every returned post carries a payment strongRef verified against an active broker-attested payment; the AppView never re-derives amount/currency/status. Public read; unverified posts are never returned and outputs carry only public record bodies, never private metadata.