test: reproduce websocket client echo bug#6

kamikaz1k wants to merge 1 commit into

agentclientprotocol:mainagentclientprotocol/java-sdk:mainfrom

kamikaz1k:codex/repro-client-transport-echo-bugkamikaz1k/acp-java-sdk:codex/repro-client-transport-echo-bugCopy head branch name to clipboard