Release v4.209.0

Changed

• A protected command read whose key, or any part of a composite key, is a shape the event store refuses (empty, whitespace-only, exactly *, containing #, or with leading or trailing whitespace) now rejects with the same Validation outcome and message as a missing view, even when the world holds an instance at that key. Other uses of such a key, including command identifiers, are unchanged. The canonical protected-reads corpus gains vectors for these shapes so hosts can prove they map their store's refusal to this outcome. See decision 0091 and Keys the event store refuses. (#843)