feat: Create Effi-STT - custom STT solution for OpenWebUI

- FastAPI server with OpenAI-compatible API
- Integration with faster-whisper (large-v3)
- Full Docker support with docker-compose
- Support for multiple languages (FR/EN/Auto)
- Clean, maintainable codebase (~100 lines)
- Health endpoint and error handling
- Volume caching for models

effi-stt/docker-compose.yml

@@ -0,0 +1,35 @@
+services:
+  effi-stt:
+    build: .
+    container_name: effi-stt
+    restart: unless-stopped
+    ports:
+      - "8200:8200"
+    environment:
+      - MODEL_SIZE=large-v3
+      - DEVICE=cpu
+      - COMPUTE_TYPE=int8
+      - LANGUAGE=fr
+      - CPU_THREADS=4
+    volumes:
+      # Cache pour les modèles (évite de re-télécharger)
+      - effi-stt-cache:/root/.cache/huggingface
+    # Pour GPU ROCm (optionnel, désactivé par défaut)
+    # devices:
+    #   - /dev/kfd
+    #   - /dev/dri
+    # group_add:
+    #   - "44"
+    #   - "991"
+    # environment:
+    #   - HSA_OVERRIDE_GFX_VERSION=11.0.0
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8200/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 60s
+
+volumes:
+  effi-stt-cache:
+    driver: local