Instead of immediately discarding a fragment like "그러면", hold it briefly
(WSAI_FRAGMENT_MERGE_MS, default 5s). If the next utterance arrives in time,
merge it in front and answer the whole thing ("그러면" + "뭐 먹지"); if nothing
follows within the window, it's silently dropped. Also redeployed the wsai-bot
container so the sustained (700ms) barge-in bot.mjs is now live.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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