/bff/expense/attachment-add

curl -X POST "https://api.bizkithub.com/bff/expense/attachment-add" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "externalId": "example_externalId",
  "blobToken": "example_blobToken",
  "kind": "example_kind",
  "label": "example_label"
}'

{
  "success": true,
  "attachmentId": 0,
  "blobId": 0
}