yichen-asr
Yichen's own unified audio and video transcription entry point, routing between StepFun Step ASR and Volcengine Doubao ASR according to output requirements, security boundaries, and availability status. Used for plain text transcription of local audio or video, timestamps, SRT subtitles, rough cuts of spoken content, and pre-transcription health checks; when the user explicitly specifies a provider, it must not silently switch. Use when a local audio or video file…