What I Ran Into Building Photo/Video/Voice Attachments for a Gift Message Card

A postmortem of building photo, video, and voice attachments for a gift message card feature — which of two internal file storages to use, the "correct" security option we had to give up on, an iOS-only audio bug, and why we hand-rolled an image editor instead of using the vendor's crop API. Problems, the calls we made, and what we still left unsolved.