Updated to Gemma4 models.

run_query.sh

@@ -7,6 +7,17 @@
 # Usage: ./run_query.sh 
 
 QUERY_SCRIPT="query_hybrid.py"
+VENV_DIR=".venv"
+
+# Activate the virtual environment
+if [ -d "$VENV_DIR" ]; then
+    source "$VENV_DIR/bin/activate"
+    echo "Activated virtual environment: $VENV_DIR"
+else
+    echo "Error: Virtual environment not found at '$VENV_DIR'" >&2
+    echo "Create one with: python3 -m venv $VENV_DIR" >&2
+    exit 1
+fi
 
 echo -e "Current query engine is $QUERY_SCRIPT\n"