A tier whose module a later tier is built by waited for the machines running it to report after the
build — and relied on the catalogue's moved event to send them. A rebuild from the same source commit is
not a move the catalogue announces: the build machine rebuilt for a controller change kept its commit,
nothing sent it, and the plan waited on a report that would never come (2026-10-01, 19:45Z). The plan
now sends the machines running a gated module once, records when, and waits for the reports after that.
jschoubben