refresh_stale ran a parent's rescrape and its children's truth and
export jobs side by side, so a child read the parent mid-rewrite. A job
now starts once the rescrapes of its ancestors have ended, and a child
no row names gets its export rewritten after them. A rescrape chain ends
on verify.py --platform, whose summary closes the report.
The buildbot system row was planned as refresh_data_dirs.py --key
'buildbot system', which always exits 1 on an unknown key. A data row now
runs only when its subject is a _data_dirs.yml entry; the rest is shown
for a human to add.
exports/ is committed but CI cannot rebuild it, since the originals it
patches live in the local cache. The native freshness check now runs
the export offline and compares it with the committed files, and
refresh_stale writes the export again after refreshing an original.
Abdessamad Derraz