Add Kaniko build automation for resume-site

- Namespace for resume-site resources
- Build trigger CronJob (runs every 5 minutes)
- Kaniko-based image builds to Harbor
- RBAC for build job creation
- PVC for tracking last commit

Follows same pattern as neon-vortex

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

k8s/build-trigger-cronjob.yaml

@@ -0,0 +1,39 @@
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: resume-site-build-trigger
+  namespace: resume-site
+spec:
+  schedule: "*/5 * * * *"
+  concurrencyPolicy: Forbid
+  successfulJobsHistoryLimit: 1
+  failedJobsHistoryLimit: 1
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          serviceAccountName: build-trigger-cron-sa
+          restartPolicy: Never
+          containers:
+          - name: trigger
+            image: alpine/k8s:1.28.13
+            command:
+            - /bin/bash
+            args:
+            - -c
+            - |
+              apk add --no-cache git bash curl
+              /scripts/trigger-build.sh
+            volumeMounts:
+            - name: script
+              mountPath: /scripts
+            - name: data
+              mountPath: /data
+          volumes:
+          - name: script
+            configMap:
+              name: build-trigger-script
+              defaultMode: 0755
+          - name: data
+            persistentVolumeClaim:
+              claimName: build-trigger-data