ONNX fp16 conversion of Google's Perch 2.0 bird-vocalization classifier (14,795 classes, 5s windows at 32kHz), packaged as the on-device model for the Earshot app. Upstream model: google/bird-vocalization-classifier (Apache-2.0). This repo hosts the exact bytes Earshot's on-device size+SHA256 verifier pins; do not modify files in place -- publish a new artefact and update the app's pins instead.