curl --request POST \
  --url https://api.promptmetrics.dev/template/{identifier}/run \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "version": 123,
  "env_label": "<string>",
  "variables": {}
}
'

{
  "request_id": "<string>",
  "latency": 123,
  "total_cost": 123,
  "status": "<string>"
}