ONNX export of SpeechBrain's spkrec-ecapa-voxceleb (80-mel fbank input → 192-dim embedding) used by mellonella.
Format: ONNX (custom mellonella-side export, see scripts/export_*.py
in the mellonella repository). Not interchangeable with other community
ONNX mirrors — the I/O contract is specific to this project.
