fix: patch last external_data ref in Constant_588 node attribute (model_q8 → model.onnx_data)

fix: update README with standard onnx filenames

fix: standardize ONNX filenames (model.onnx + model.onnx_data) for HF transformers pipeline compatibility

fix: update README with correct onnx filenames

fix: restore original ONNX filenames (model_q8.onnx) — names are hardcoded in ONNX graph

fix: update README file paths to onnx/ directory

fix: move ONNX model to onnx/ directory with standard naming

Initial release: 7-class intent router (ONNX int8)

initial commit