The fold's watch of every have key ('>') was refused (permissions violation on
CONSUMER.CREATE KV_node-engine_have), and every self-composing agent stopped
after the seed. The composer now watches '*.node' (records) and '<node>.>' (its
own haves), as buscompose grants a node; the shadow watches '<node>.>' too. The
selfcompose tests check every watch and get against PermissionsFor(KindNode),
and the agent's integration tests run the agent as the node under that grant.