GET Analytics Dashboard

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OVERVIEW
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Endpoint: GET /api/v1/analytics/dashboard
Method: GET
Authentication: Not Required
Rate Limit: 50 requests/minute

PURPOSE:
Retrieves comprehensive analytics dashboard data including weekly trends
and privacy metrics.

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EXAMPLE RESPONSE
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{
  "success": true,
  "period": "7d",
  "summary": {
    "totalTransactions": 342,
    "volumeUSD": 234567.89,
    "averagePrivacyDelay": 1847,
    "averageAnonymitySetSize": 387
  },
  "privacyMetrics": {
    "percentWithdrawingToDifferentAddress": 94.3,
    "percentMeetingMinimumDelay": 98.7
  }
}