Determine / Measure / Mitigate 18GiB upper limit

[10d9e]

Steps to reproduce:

1. Attempt to upload a 835 GiB file to https://edge.estuary.tech/.
2. Results:

Uploading 835 GiB file to edge.
{"error":{"code":500,"reason":"Internal Server Error","details":"multipart: NextPart: bufio: buffer full"}}

[schreck23]

Just attempted large file upload ... errored out:
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
2 835G 0 108 2 24.4G 0 36.7M 6:27:45 0:11:22 6:16:23 41.1M

Uploading 835 GiB file to edge.
{"error":{"code":500,"reason":"Internal Server Error","details":"multipart: NextPart: bufio: buffer full"}}