List folders (flat, cursor-paginated)

curl 'https://api.expiryedge.com/v2/folders?limit=50' \
  -H "Authorization: Bearer $EXPIRYEDGE_API_KEY"

{
  "data": [
    {
      "id": "fol_123",
      "name": "Example name",
      "parent_folder_id": "fol_123",
      "folder_path": "/Licenses/Dental",
      "organization_id": "org_123",
      "user_id": "use_123",
      "is_deleted": true,
      "created_at": "2026-09-27T14:05:00.000Z",
      "updated_at": "2026-09-27T14:05:00.000Z"
    }
  ],
  "next_cursor": "string",
  "has_more": true
}