Update model card with YAML frontmatter and two-stage pipeline example

Update model card with calibration config, ONNX docs, and corrected metrics

Add ONNX model export: calibration_config.json

Add ONNX model export: config.json

Add ONNX model export: special_tokens_map.json

Add ONNX model export: tokenizer_config.json

Add ONNX model export: tokenizer.json

Add ONNX model export: model.onnx

Add calibration config with optimized thresholds

Upload optimal_thresholds.json with huggingface_hub

Upload README.md with huggingface_hub

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initial commit