Fix PYTHONPATH to prioritize NGC system packages over pip-packages

Update PYTHONPATH to search /usr/local/lib/python3.12/dist-packages before
/pip-packages, ensuring NGC's NumPy 1.x (required by torchvision) is found
before pip's NumPy 2.x which gets installed as a transitive dependency.

This fixes the 'Numpy is not available' error during OCR inference.

Author: rajsinghtech

clusters/k3s-stpetersburg/apps/ai/kserve/inferenceservice.yaml

@@ -41,7 +41,7 @@ spec:
       - name: PYTORCH_CUDA_ALLOC_CONF
         value: "max_split_size_mb:512"
       - name: PYTHONPATH
-        value: "/app:/pip-packages"
+        value: "/app:/usr/local/lib/python3.12/dist-packages:/pip-packages"
       ports:
       - containerPort: 8080
         protocol: TCP