ElevenLabs sends all JSON messages as binary WS frames, not text frames.
The OnRawMessage callback receives them; we were logging them as warnings
and discarding the data entirely — causing no events to fire at all.
Fix: accumulate binary frame fragments (BytesRemaining > 0 = more coming),
reassemble into a complete buffer, decode as UTF-8 JSON string, then route
through the existing OnWsMessage text handler unchanged.
Added BinaryFrameBuffer (TArray<uint8>) to proxy header for accumulation.
Compiles cleanly on UE 5.5 Win64.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
j.foucher
669c503d06