mesh/delivery delivered
mesh/check checking 0741880d3137 on 760351b4ae1b
A sweep read what it keeps before what was ever recorded, so a take-in's build recorded between the two reads, by a concurrent take-in off the plans' hold, was eligible and let go of seconds after the take-in read it; a new module's build is unkept until it is registered. Now the sweep reads the records first and keeps what a build recorded within the hour or an open plan names, and names every reference it lets go of; a take-in holds every artifact in the store before recording, failing on one the store lacks; and RecordBuild clears artifact_collected as RecordMirrored does.