Add Gunicorn support for production in Vosk service and update requirements

vosk/test_files/run_optimized_192cores.sh

@@ -44,10 +44,20 @@ if ! curl -s http://localhost:5000/ > /dev/null; then
     
     # Start optimized Vosk service
     cd ../vosk_service
-    export USE_ASYNC=true
-    python app_optimized.py &
-    VOSK_PID=$!
-    echo "✅ Vosk service started with PID: $VOSK_PID"
+    
+    # Choose between async and production mode
+    if [ "$USE_ASYNC" = "true" ]; then
+        export USE_ASYNC=true
+        python start_service.py &
+        VOSK_PID=$!
+        echo "✅ Vosk async service started with PID: $VOSK_PID"
+    else
+        # Use Gunicorn for production multiprocessing
+        export USE_GUNICORN=true
+        gunicorn -c gunicorn_config.py app_optimized:app &
+        VOSK_PID=$!
+        echo "✅ Vosk Gunicorn service started with PID: $VOSK_PID"
+    fi
     
     # Wait for service to be ready
     echo "⏳ Waiting for service to be ready..."