https://reference.readinessindex.io/dimensions/primary-indicators 2026-09-19 https://reference.readinessindex.io/dimensions/rendering-and-extraction 2026-09-21 https://reference.readinessindex.io/dimensions/structured-data 2026-09-22 https://reference.readinessindex.io/dimensions/crawl-and-licensing 2026-09-23 https://reference.readinessindex.io/dimensions/authorship-and-freshness 2026-09-24 https://reference.readinessindex.io/dimensions/agent-interfaces 2026-09-25 https://reference.readinessindex.io/dimensions/alternate-representations 2026-09-26