A key that later cannot be read or is deleted is said, the key last heard stands and the list loaded stays. A key without
the flag still falls back, as before.
Tests: three rows added to the existing table test of the follower; no new test function. Built against the group's
mesh-sdk through a go.work outside the tree; go.mod is not re-pinned here.
(issue 774, 774/S31)
Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL