curl --request GET \
  --url https://api.contazen.ro/v1/clients \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "object": "list",
    "has_more": true,
    "total": 123,
    "page": 123,
    "per_page": 123,
    "total_pages": 123,
    "data": [
      {
        "id": "cli_1a2b3c4d5e",
        "object": "client",
        "name": "<string>",
        "email": "jsmith@example.com",
        "phone": "<string>",
        "cui": "<string>",
        "cui_prefix": "<string>",
        "rc": "<string>",
        "address": "<string>",
        "city": "<string>",
        "county": "<string>",
        "country": "<string>",
        "postal_code": "<string>",
        "iban": "<string>",
        "bank": "<string>",
        "contact_person": "<string>",
        "created_at": 123,
        "updated_at": 123,
        "metadata": {
          "invoices_count": 123,
          "total_invoiced": 123,
          "unpaid_total": 123
        },
        "stats": {
          "total_invoiced": 123,
          "total_collected": 123,
          "avg_payment_days": 123,
          "last_payment": {
            "date": 123,
            "amount": 123,
            "currency": "<string>",
            "bill_id": "<string>",
            "bill_number": "<string>"
          },
          "monthly_series": [
            {
              "label": "Mar 2026",
              "year": 123,
              "month": 123,
              "invoiced": 123,
              "collected": 123
            }
          ]
        }
      }
    ]
  },
  "meta": {
    "version": "v1",
    "request_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "response_time": "23.45ms"
  }
}