curl --request GET \
  --url https://folksbase.onrender.com/api/stats \
  --header 'Authorization: Bearer <token>'

{
  "totalContacts": 123,
  "totalImports": 123,
  "successRate": 123,
  "contactsThisMonth": 123,
  "contactsGrowth": [
    {
      "date": "<string>",
      "count": 123
    }
  ]
}