send_voice built its own discord.File from the audio bytes and never ran
the size preflight, so an oversized audio attachment still burned the
doomed 413 round-trip that #50846 is about. Route it through the same
_reject_oversized_upload helper as _send_file_attachment.
The limit constant and _discord_upload_limit_bytes lived on the adapter
facade while every consumer is in adapter_media.py; the facade+sibling
layout puts topic code in the sibling, so they move there.
teknium1
8ed7c180d7