cran-rpkgs-test was added as a second pull zone on the same B2 origin but
never added to the purge list, so it kept serving pre-reindex indexes
behind the same ~370 day cache_expiration_time as production.
That is not cosmetic: a verification run against staging measures whatever
the edge still holds. amd64/alpine323 reported 161 regressions there while
production, freshly purged, reported zero for the same objects. The
staging zone exists to be measured, so it has to be purged like any other.
pat-s
996e690985