Adds a stale-publication gate. After ranking, count rows whose publication or document read failed and were kept from the previous crawl. Refuse the run when that is more than 10% of ranked publications.
--max-stale-share changes the limit. The default is 10%, so at the current 1,882 ranked publications the cap is 188 stale blogs. The warning on each affected page remains.
183 tests and prek pass.