feat(phase-1.1): deploy temporal server in k8s

Temporal infrastructure deployment with:
  - PostgreSQL StatefulSet (event log + visibility)
    - 10Gi PVC, health checks, port 5432
  - Elasticsearch StatefulSet (workflow search)
    - 20Gi PVC, health checks, port 9200
  - Temporal Server StatefulSet (main service)
    - Frontend: 7233, Matching: 7235, History: 7234, Worker: 7239
    - Headless + ClusterIP services
    - Auto-setup image: temporalio/auto-setup:1.20.0
  - Temporal UI Deployment (web visualization)
    - Port 3000, connects to frontend:7233
    - LoadBalancer service for access

Components:
  - 00-namespace.yaml: dedicated temporal namespace
  - 01-postgres-statefulset.yaml: event log backend
  - 02-elasticsearch-statefulset.yaml: search visibility
  - 03-temporal-server-statefulset.yaml: server + services
  - 04-temporal-ui-deployment.yaml: web ui
  - kustomization.yaml: deployment automation
  - README.md: deployment + troubleshooting guide

Health checks: liveness + readiness on all components
Persistence: PVCs with dynamic provisioning
Ports: 5432 (postgres), 9200 (es), 7233-7239 (temporal)

Deploy: kubectl apply -k k8s/temporal/

Effort: 150 LOC (complete K8s manifests)

k8s/temporal/04-temporal-ui-deployment.yaml

@@ -0,0 +1,85 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: temporal-ui
+  namespace: temporal
+  labels:
+    app: temporal-ui
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: temporal-ui
+  template:
+    metadata:
+      labels:
+        app: temporal-ui
+    spec:
+      containers:
+      - name: ui
+        image: temporalio/ui:2.10.0
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: http
+          containerPort: 8080
+          protocol: TCP
+        env:
+        - name: TEMPORAL_ADDRESS
+          value: "temporal-frontend.temporal.svc.cluster.local:7233"
+        - name: TEMPORAL_CORS_ORIGINS
+          value: "http://localhost:3000"
+        resources:
+          requests:
+            cpu: 100m
+            memory: 128Mi
+          limits:
+            cpu: 500m
+            memory: 512Mi
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 8080
+          initialDelaySeconds: 30
+          periodSeconds: 10
+        readinessProbe:
+          httpGet:
+            path: /
+            port: 8080
+          initialDelaySeconds: 10
+          periodSeconds: 5
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: temporal-ui
+  namespace: temporal
+  labels:
+    app: temporal-ui
+spec:
+  type: ClusterIP
+  ports:
+  - port: 3000
+    targetPort: 8080
+    protocol: TCP
+    name: http
+  selector:
+    app: temporal-ui
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: temporal-ui-external
+  namespace: temporal
+  labels:
+    app: temporal-ui
+spec:
+  type: LoadBalancer
+  ports:
+  - port: 3000
+    targetPort: 8080
+    protocol: TCP
+    name: http
+  selector:
+    app: temporal-ui