Cloudinary: uploading file as buffer fails in production (Next.js)

## What happened

In a Next.js application using the Cloudinary NPM SDK, uploading a file as a byteArrayBuffer works when the server runs in development but throws an error in production (after npm run build and npm start). The failure came from how upload_stream handled buffers in the production bundle, not from app code.

## The fix that worked

Upgrade the Cloudinary Node SDK to v2.0.3 or later: the production upload_stream buffer bug was fixed there, and both the reporter and another user confirmed uploads now work for jpg, png, and svg in production. If you must stay on the old version, send the file as a stream instead of a buffer.