Get compute usage and billing

{
  "period": {
    "year": 2024,
    "month": 3,
    "monthName": "March"
  },
  "summary": {
    "totalRuns": 47,
    "totalGpuHours": 12.5,
    "totalCpuHours": 3.2,
    "totalCostCents": 4750,
    "totalCostFormatted": "$47.50"
  },
  "byEnvironment": [
    {
      "environment": "legal-document-processing",
      "totalRuns": 35,
      "totalGpuSeconds": 36000,
      "totalCpuSeconds": 7200,
      "totalCostCents": 3200,
      "totalCostFormatted": "$32.00"
    },
    {
      "environment": "contract-analysis",
      "totalRuns": 12,
      "totalGpuSeconds": 9000,
      "totalCpuSeconds": 4320,
      "totalCostCents": 1550,
      "totalCostFormatted": "$15.50"
    }
  ]
}