Credential grants

curl -X POST https://app.dacard.ai/api/credential-grants \
  -H "Authorization: Bearer $DACARD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "integrationId": "int_xyz",
    "granteeEmail": "designer@acme.com",
    "expiresInHours": 168,
    "scope": "read"
  }'

curl -X PATCH https://app.dacard.ai/api/credential-grants/grnt_xyz \
  -H "Authorization: Bearer $DACARD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "expiresInHours": 24 }'

curl -X DELETE https://app.dacard.ai/api/credential-grants/grnt_xyz \
  -H "Authorization: Bearer $DACARD_API_KEY"