Yisheng Cloud Opus transport component

libCloudOpus.dylib statically includes libopus 1.6.1 from Xiph.Org.
Source: https://downloads.xiph.org/releases/opus/opus-1.6.1.tar.gz
Source SHA-256: 6ffcb593207be92584df15b32466ed64bbec99109f007c82205f0194572411a1
Copyright and redistribution terms: licenses/COPYING.libopus.txt
Contributor list: licenses/AUTHORS.libopus.txt

The project wrapper exports fixed 48 kHz, 20 ms float-PCM encode/decode APIs.
The library is built for arm64 macOS and depends only on macOS libSystem.
Deep PLC, DRED and OSCE neural extensions are disabled in this build.
No external runtime, separately downloaded model, or Homebrew installation
is required on the client.

Opus is a lossy codec. The transport copy uses high-bitrate fullband AUDIO
mode without DTX, FEC, packet-loss concealment or speech enhancement.
Native local recordings are separate and are not replaced by this stream.
