Add cuisine subcategory filter, fix remap logic, and add OKE deployment manifests

- Add 파인다이닝/코스 cuisine type to 한식/일식/중식/양식 categories
- Change cuisine filter from flat list to grouped optgroup with subcategories
- Fix remap-foods/remap-cuisine: add jdbcType=CLOB, fix CLOB LISTAGG,
  improve retry logic (3 attempts, batch size 5), add error logging
- Add OKE deployment: Dockerfiles, K8s manifests, deploy.sh, deployment guide
- Add Next.js standalone output for Docker builds

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

k8s/backend-deployment.yaml

@@ -0,0 +1,70 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: backend
+  namespace: tasteby
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: backend
+  template:
+    metadata:
+      labels:
+        app: backend
+    spec:
+      imagePullSecrets:
+        - name: ocir-secret
+      containers:
+        - name: backend
+          image: icn.ocir.io/idyhsdamac8c/tasteby/backend:latest
+          ports:
+            - containerPort: 8000
+          envFrom:
+            - configMapRef:
+                name: tasteby-config
+            - secretRef:
+                name: tasteby-secrets
+          volumeMounts:
+            - name: oracle-wallet
+              mountPath: /etc/oracle/wallet
+              readOnly: true
+            - name: oci-config
+              mountPath: /root/.oci
+              readOnly: true
+          resources:
+            requests:
+              cpu: 500m
+              memory: 768Mi
+            limits:
+              cpu: "1"
+              memory: 1536Mi
+          readinessProbe:
+            tcpSocket:
+              port: 8000
+            initialDelaySeconds: 30
+            periodSeconds: 10
+          livenessProbe:
+            tcpSocket:
+              port: 8000
+            initialDelaySeconds: 60
+            periodSeconds: 30
+      volumes:
+        - name: oracle-wallet
+          secret:
+            secretName: oracle-wallet
+        - name: oci-config
+          secret:
+            secretName: oci-config
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: backend
+  namespace: tasteby
+spec:
+  selector:
+    app: backend
+  ports:
+    - port: 8000
+      targetPort: 8000