Hotwords give per-request logit boosts to specified terms throughout
decoding (not just as prefix context like initial_prompt). Measured on
a cardiology dictation: 8/8 correct fachbegriffe vs. 3/8 without.
Off-the-shelf Whisper wrappers hardcode faster-whisper defaults that
cause cascading hallucinations on real dictations (2/13 runs against
ahmetoner v1.9.1). This thin FastAPI service mirrors the /asr interface
but fixes condition_on_previous_text=False, temperature=0.0, and
vad_filter=True so the Axum server can switch by changing WHISPER_URL.
Brummel