Consume faster-whisper SSE instead of blocking on one JSON response, persist growing text and progress over Reverb, and drop the fake percent heartbeat.
Implement a new method for calculating elapsed transcription time in the Recording model. Enhance the TranscriptionService to handle local Whisper requests, including asynchronous processing and progress reporting. Update the recordings index view to display transcription progress percentage. Add unit tests for the new transcription service functionality.
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