fix: add PVC for ollama data persistence

ai/ollama.yaml

@@ -1,3 +1,16 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: ollama-pvc
+  namespace: ai
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: local-path
+  resources:
+    requests:
+      storage: 20Gi
+---
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -33,7 +46,8 @@ spec:
           mountPath: /root/.ollama
       volumes:
       - name: ollama-data
-        emptyDir: {}
+        persistentVolumeClaim:
+          claimName: ollama-pvc
 ---
 apiVersion: v1
 kind: Service