infra: add 50Gi PVC for DevPod home directory

Persistent block storage for Claude Code, cargo registry, sccache
cache, and shell config. Survives pod restarts and node scale-down.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

infra/k8s/storage/dev-home-pvc.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: dev-home-pvc
+  namespace: foxhunt
+  labels:
+    app.kubernetes.io/name: dev-home
+    app.kubernetes.io/part-of: foxhunt
+    app.kubernetes.io/component: devpod
+spec:
+  storageClassName: scw-bssd
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 50Gi