dsh-tool-cost-hint

摘要 JSON 形状（TurnToolUsageSummary）

{
  "version": 1,
  "sessionId": "session-3",
  "turn": 7,
  "startedSeq": 120,
  "endedSeq": 148,
  "durationMs": 41230,
  "reason": "completed",
  "tools": [
    { "name": "read", "calls": 4, "errors": 0, "inputTokens": 96,
      "outputTokens": 8120, "injectedTokens": 8216,
      "inputTokensSource": "estimate", "outputTokensSource": "meter" }
  ],
  "totalCalls": 4,
  "totalErrors": 0,
  "totalInputTokens": 96,
  "totalOutputTokens": 8120,
  "totalInjectedTokens": 8216,
  "unattributedCalls": 0,
  "orphanResults": 0
}

排序固定：injectedTokens 降序 → calls 降序 → name 升序（同一轮数据永远同样顺序，UI 与日志可复现）。

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