A retail company runs a stateless web API on Azure Virtual Machine Scale Sets deployed in two regions: East US and West Europe. Customers are global, and the company wants all inbound API traffic to be automatically directed to the nearest healthy regional deployment based on network latency, with automatic failover if one region becomes unavailable. The solution must operate at the TCP/UDP layer because the API uses a custom binary protocol over a non-HTTP port, and it must expose a single static anycast IP address to clients. Which Azure load-balancing service should you recommend?