Flow-based monitoring for Magic Transit

What this post added

Introduces flow-based monitoring for Magic Transit on-demand customers. This feature allows customers to send NetFlow or sFlow data from their routers to Cloudflare for analysis. Cloudflare can then detect volumetric DDoS attacks and notify customers via email, webhook, or PagerDuty. This enables customers to activate Magic Transit for protection, either manually or automatically, minimizing the time to mitigation.