Mirrors the _discord_require_mention()/_discord_max_attachment_bytes() shape, makes the lookup lazy (it only runs on the free-channel path now), and keeps the in-code key manifests in _handle_message and register() listing the new key.
Mirrors the _discord_require_mention()/_discord_max_attachment_bytes() shape, makes the lookup lazy (it only runs on the free-channel path now), and keeps the in-code key manifests in _handle_message and register() listing the new key.