An event a module's consumer heard after the module was dropped for a
reload read a deleted entry and panicked node-tools, taking every tool on
the machine down. The handler now refuses an event of a consumer that is no
longer the module's, and a stopped hearing hands nothing on and offers the
event again at once.
A bundle that writes beside itself (a cache, a socket) loaded itself again
after every quiet spell, because the signature took in every file in its
directory. A delivery puts every file in place anew, so the entrypoint alone
tells a new build. The watch also looks once as it begins, so a bundle that
came between its load and the watch is not missed.
Tests: 1945/AC23 and AC24 in internal/runtime/reload_test.go, and a stopped
hearing in internal/bus/hearing_stopped_test.go.
