Render the lighter "vintage stale" annotation used when connectivity is fine but the WEO release is more than STALE_VINTAGE_MAX_MONTHS old.
vintageAgeMonths === -1 is the sentinel buildReport() uses for malformed vintage tags — render it as "unknown age" rather than the confusing literal "-1 months old".
Render the lighter "vintage stale" annotation used when connectivity is fine but the WEO release is more than
STALE_VINTAGE_MAX_MONTHSold.vintageAgeMonths === -1is the sentinelbuildReport()uses for malformed vintage tags — render it as "unknown age" rather than the confusing literal "-1 months old".