A PUT that R2 accepted just before its URL expired can keep sending for as
long as the connection takes: a 15 MB image at 12 KB/s needs about 20
minutes. Deleting its object after a fixed 15 minutes could still orphan
the bytes. A day covers any real upload, and the wait costs little since a
deleted element's image already stays for its 30-day tombstone.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>