f835642b1c
Adds support for Zipformer transducer ASR models that use Whisper-style features by introducing a new feature flag, parsing metadata, and integrating per-chunk normalization. - Introduce UseWhisperFeature in the model interface and Zipformer implementation - Parse "feature" metadata to set the whisper flag and wire it into the recognizer - Update feature extraction logic to handle Whisper filterbanks with early returns