feat(otc): 🛡️ default StorageClass reclaimPolicy to Retain

Prevents accidental data loss on PVC deletion. Volumes persist even
when PVC is removed. Ephemeral environments can override via
STORAGE_RECLAIM_POLICY=Delete env var.

Ref: IPCEICIS-2810

renovate.json

@@ -1,3 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
-}

template/stacks/otc/storageclass/storageclass.yaml

@@ -13,6 +13,6 @@ parameters:
   kubernetes.io/volumetype: SATA
   kubernetes.io/zone: eu-de-02
 provisioner: flexvolume-huawei.com/fuxivol
-reclaimPolicy: Delete
+reclaimPolicy: {{{ getenv "STORAGE_RECLAIM_POLICY" "Retain" }}}
 volumeBindingMode: Immediate
 allowVolumeExpansion: true