curl --request GET \
  --url https://apiv1.delightloop.ai/api/campaigns/templates/{templateId} \
  --header 'x-api-key: <x-api-key>'

{
  "success": true,
  "message": "Template retrieved successfully",
  "data": {
    "templateId": "tmpl-abcd1234",
    "organizationId": "org-001",
    "templateName": "Gift Campaign with Claim Page",
    "templateCategory": "Digital Gifting",
    "isDelightloop": true,
    "tags": [
      "Achievement",
      "Celebration",
      "Luxury"
    ],
    "successRate": 85,
    "templateData": {
      "goal": {
        "goalId": "g1",
        "name": "Customer Delight",
        "description": "Delight top customers with gifts",
        "logo": "https://cdn.com/goal.png",
        "logoColor": "#FF5733"
      }
    },
    "createdAt": "2025-09-01T12:43:16.948Z",
    "updatedAt": "2025-09-01T12:43:16.948Z",
    "description": "Blueprint with landing + claim pages for digital gifting",
    "imageUrl": "https://cdn.delightloop.ai/templates/preview/template-123.png"
  }
}