Get on-time completion metrics per assignee

curl 'https://api.expiryedge.com/v1/getTeamProductivity?days=90' \
  -H "Authorization: Bearer $EXPIRYEDGE_API_KEY"

{
  "success": true,
  "lookbackDays": 90,
  "productivity": [
    {
      "userId": "u_71bXq",
      "name": "Priya Shah",
      "total": 20,
      "completed": 12,
      "completedOnTime": 11,
      "completedLate": 1,
      "pending": 7,
      "overdue": 1,
      "daysBeforeExpiry": [
        14,
        3,
        21
      ],
      "onTimeRate": 92,
      "avgDaysBeforeExpiry": 13
    }
  ]
}