List and create decisions

curl -X GET "https://app.dacard.ai/api/decisions?productId=prod_abc" \
  -H "Authorization: Bearer $DACARD_API_KEY"

curl -X POST https://app.dacard.ai/api/decisions \
  -H "Authorization: Bearer $DACARD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "productId": "prod_abc",
    "title": "Move pricing page above the fold on /platform",
    "context": "PLG audit found the funnel split was kicking in too late.",
    "decisionType": "shipped",
    "linkedMoveId": "mv_xyz"
  }'