[Bug]:上下文压缩失效导致agent运行失败

`"metadata": {
"_chat_usage": {
"inputTokens": 76789,
"outputTokens": 1344,
"cachedTokens": 0,
"time": 76.132,
"totalTokens": 78133
}
},
"timestamp": "2026-09-04 17:16:02.922",
"usage": {
"inputTokens": 76789,
"outputTokens": 1344,
"cachedTokens": 0,
"time": 76.132,
"totalTokens": 78133
}`
从studio上观测到最后一条totalTokens已经达到了78133，设置得triggerTokens=70000，通过断点调试`ConversationCompactor.compactIfNeeded,TokenCounterUtil.calculateToken(messages)`最终计算出来的token=3.8万，汉字居多，导致上下文超限，模型是本地部署Qwen3_5-27B-FP8