Configure SockJS transports to handle HTTP/2 WebSocket upgrade issues

Shipped: November 5, 2025 at 12:27 AM UTC
Author: snadjafinia
Commit: 2ee9c65

- Explicitly configure SockJS transport order to prefer WebSocket, then fallback to xhr-streaming/xhr-polling - HTTP/2 WebSocket upgrades may fail, so SockJS will automatically fallback to HTTP/1.1 compatible transports - This should resolve WebSocket connection timeouts when browser uses HTTP/2

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