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构建链路追踪Span树

未完成

示例

输入
solve()
期望输出
Trace: trace-0001
└ device-gateway/receive_payload: 5.0ms
  └ data-ingestion/validate: 9.0ms
    └ data-ingestion/parse: 9.0ms
      └ timeseries-db/store: 34.0ms

Trace: trace-0002
└ device-gateway/receive_payload: 5.0ms
  └ data-ingestion/validate: 9.0ms
    └ data-ingestion/parse: 9.0ms
      └ timeseries-db/store: 34.0ms

Trace: trace-0003
└ device-gateway/receive_payload: 5.0ms
  └ data-ingestion/validate: 9.0ms
    └ data-ingestion/parse: 9.0ms
      └ timeseries-db/store: 34.0ms
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