Introducing: Smarter Tiered Cache Topology Generation

Introduced Smart Tiered Cache Topology, which dynamically selects the single best upper-tier data center for each origin based on Argo performance and routing data. This replaces the previous static collection of upper-tier data centers. For self-serve customers, this is enabled by default when Argo Tiered Cache is active. Enterprise customers have more configuration options. The feature also provides new analytics in the Cache tab for Tiered Cache, showing primary/secondary data centers, cached hits, hit ratio, and bytes saved.