feat(asr): faster-whisper CPU latency benchmark and M2 listening ADR (#6)

feat(ml): ONNX int8 export and torch-free CPU inference service (#4)

docs(evals): M1 classifier report, per-corpus OOD reads and production decision (#3)

feat(ml): CEFR dataset builder and XLM-R training pipeline with MLflow tracking (#2)

feat: M0 walking skeleton (app, service protocols, CI/CD, Space deploy)