chore(ci): dont run llama stack server always (#3188)

Sometimes the server has already been started (e.g., via docker). Just a
convenience here so we can reuse this script more.

scripts/integration-tests.sh

@@ -133,6 +133,10 @@ else
     EXTRA_PARAMS=""
 fi
 
+THIS_DIR=$(dirname "$0")
+ROOT_DIR="$THIS_DIR/.."
+cd $ROOT_DIR
+
 # Set recording directory
 if [[ "$RUN_VISION_TESTS" == "true" ]]; then
     export LLAMA_STACK_TEST_RECORDING_DIR="tests/integration/recordings/vision"
@@ -142,6 +146,10 @@ fi
 
 # Start Llama Stack Server if needed
 if [[ "$STACK_CONFIG" == *"server:"* ]]; then
+    # check if server is already running
+    if curl -s http://localhost:8321/v1/health 2>/dev/null | grep -q "OK"; then
+        echo "Llama Stack Server is already running, skipping start"
+    else
         echo "=== Starting Llama Stack Server ==="
         nohup uv run llama stack run ci-tests --image-type venv > server.log 2>&1 &
 
@@ -160,6 +168,7 @@ if [[ "$STACK_CONFIG" == *"server:"* ]]; then
             sleep 1
         done
         echo ""
+    fi
 fi
 
 # Run tests