Add bingx-trading StorageClass (longhorn-bingx, Retain)

Used by the bingx-trading deployment at trade.expertfab.de.
Full manifests in git.expertfab.de/expertfab/bingx-trading k8s/.

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

k8s/bingx-trading/storageclass.yaml

@@ -0,0 +1,11 @@
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: longhorn-bingx
+provisioner: driver.longhorn.io
+reclaimPolicy: Retain
+volumeBindingMode: Immediate
+parameters:
+  numberOfReplicas: "2"
+  staleReplicaTimeout: "2880"
+  dataLocality: disabled