createCompositeTransport creates a Transport that delegates Unary RPCs to one
transport, and Streaming RPCs (Client, Server, Bidi) to another.
This is typically used to route Unary RPCs over standard HTTP/1.1 or HTTP/2
(using createConnectTransport) for better observability, caching, and proxy
support, while using WebTransport or WebSockets for streaming RPCs.
createCompositeTransport creates a Transport that delegates Unary RPCs to one transport, and Streaming RPCs (Client, Server, Bidi) to another.
This is typically used to route Unary RPCs over standard HTTP/1.1 or HTTP/2 (using createConnectTransport) for better observability, caching, and proxy support, while using WebTransport or WebSockets for streaming RPCs.