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/frontend-deployment.yaml

@@ -0,0 +1,53 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: frontend
+  namespace: tasteby
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: frontend
+  template:
+    metadata:
+      labels:
+        app: frontend
+    spec:
+      imagePullSecrets:
+        - name: ocir-secret
+      containers:
+        - name: frontend
+          image: icn.ocir.io/idyhsdamac8c/tasteby/frontend:latest
+          ports:
+            - containerPort: 3001
+          resources:
+            requests:
+              cpu: 200m
+              memory: 256Mi
+            limits:
+              cpu: 500m
+              memory: 512Mi
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 3001
+            initialDelaySeconds: 10
+            periodSeconds: 10
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 3001
+            initialDelaySeconds: 15
+            periodSeconds: 30
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+  namespace: tasteby
+spec:
+  selector:
+    app: frontend
+  ports:
+    - port: 3001
+      targetPort: 3001