Short-lived WebSocket Connection Benchmark — Validation Checks

The same validate-ws.py checks executed for the Echo profile apply here. Closing a connection after 10 messages is a load-generator behaviour, not a separate server contract: the endpoint, the framing and the expected echo are identical.

scripts/validate.sh runs those checks for any framework subscribed to echo-ws, echo-ws-pipeline or echo-ws-limited, so subscribing to this profile alone is enough to have the WebSocket endpoint validated.

The behaviour specific to this profile — a fresh handshake for every connection — is exercised during the benchmark run rather than by a dedicated check. A server that only answers the first handshake correctly, or that reuses a precomputed Sec-WebSocket-Accept, fails every subsequent upgrade and reports a throughput near zero.