curl -X GET \
  'https://platform.returnqueen.dev/api/webhooks/event-types' \
  -H 'X-API-KEY: your-api-key'

{
  "event_types": [
    {
      "name": "shipment.created",
      "description": "Triggered when a new shipment is created",
      "category": "shipment",
      "schema": {
        "shipment_id": "string",
        "order_number": "string",
        "status": "string",
        "created_at": "datetime"
      }
    },
    {
      "name": "shipment.cancelled",
      "description": "Triggered when a shipment is cancelled",
      "category": "shipment",
      "schema": {
        "shipment_id": "string",
        "order_number": "string",
        "cancelled_at": "datetime",
        "cancelled_reason": "string"
      }
    },
    {
      "name": "pickup.completed",
      "description": "Triggered when a pickup is completed",
      "category": "pickup",
      "schema": {
        "pickup_id": "string",
        "completed_at": "datetime",
        "shipment_ids": "array"
      }
    }
  ]
}