//! ONNX-based speech recognition engines.
//!
//! Each model is available as a top-level module (e.g. `onnx::sense_voice::SenseVoiceModel`)
//! and implements the `SpeechModel` trait for a unified transcription API.
/// Preferred precision for ONNX model loading.
///
/// This selects which model file variant to load. If the requested
/// variant is not found on disk, falls back to FP32 with a warning.
/// ONNX quantization is baked into the model file — this enum controls
/// file selection, not runtime behavior.