Add custom faster-whisper service with anti-hallucination params

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.

whisper/docker-compose.yml

@@ -0,0 +1,21 @@
+services:
+  doctate-whisper:
+    image: doctate-whisper:latest
+    container_name: doctate-whisper
+    environment:
+      - WHISPER_MODEL=large-v3-turbo
+      - WHISPER_COMPUTE_TYPE=float16
+      - NVIDIA_VISIBLE_DEVICES=all
+      - NVIDIA_DRIVER_CAPABILITIES=compute,utility
+    volumes:
+      - /opt/stacks/doctate-whisper/models:/models
+    ports:
+      - "9001:9001"
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: 1
+              capabilities: [gpu]
+    restart: unless-stopped