bug: session/trace cost mis-aggregates for multi-agent runs traced via the OpenInference Claude Agent SDK instrumentor

用户在 Langfuse 4.x 版本中,通过 OpenInference Claude Agent SDK 探针( openinference-instrumentation-claude-agent-sdk )将多 Agent 工作流的追踪数据通过 OTel 协议导入 Langfuse。典型场景








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