HearFirst reads the event's x-time as Published, notes a subscription the bus
refuses while the others go on waiting, and answers a wait refused whole only
after its timeout, in words naming the grants part's grant of every event
subject; mesh_wait lists the refused subjects in its answer.
Builds: design 34 every-event §12, §16, §18, §19 (bus/wait_test.go)
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h