Submit welcome interview

curl -X POST https://app.dacard.ai/api/onboarding/welcome-interview \
  -H "Authorization: Bearer $DACARD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "answers": {
      "0": "Series B SaaS, 32 employees",
      "1": "We ship every two weeks",
      "2": "Customer churn is the headline tension"
    },
    "skipped": false
  }'