Soniox hallucinated transcript handling #2197
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This PR introduces hallucination detection for Soniox streaming by comparing finalized segments against recent history using fuzzy string matching (fuzz.token_set_ratio). It suppresses segments if they are highly similar (SIMILARITY_THRESHOLD) to the last 1 or 2 segments for a defined number of times (REPEAT_COUNT_THRESHOLD). A maximum segment duration timeout (MAX_SEGMENT_DURATION_S) ensures the check runs even during long, continuous loops.
We cannot rely on the confidence field returned by soniox because it is >0.9 even for hallucinated transcript