9c59e6e82a
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- SseUsageCapture 增加 stream_done 标志，[DONE] 和 stream 结束时设置 - parse_sse_line 兼容 "data:" 和 "data: " 两种前缀 - 增加 total_tokens 兜底解析（某些 provider 不返回 prompt_tokens） - 轮询逻辑优先检测 stream_done，而非依赖 total > 0 条件 - 超时时增加 warn 日志记录实际 token 值 根因: 上游 provider 不在 SSE chunk 中返回 usage 时，轮询稳定逻辑 (total > 0 条件) 永远不满足，导致 token 始终为 0。