HTTP/4xx (Client Error)
413 Payload Too Large
The request entity is larger than limits defined by server configuration.
❓ Why does this happen?
Uploading a file larger than client_max_body_size (Nginx) or serverless body limits (e.g. 4.5MB on Vercel).
✅ How to fix it
Compress payload or use direct presigned S3/storage uploads instead of proxying through the app server.