## Description Build a complete reference application for keyword spotting (DS-CNN) on Cortex-M. Includes audio preprocessing, model inference, and post-processing. ## Acceptance Criteria - [ ] End-to-end KWS app running on Cortex-M55 (FVP and/or hardware) - [ ] Audio input -> keyword classification output pipeline working - [ ] Latency and memory footprint documented - [ ] README with build and run instructions