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-rbac.yaml

@@ -0,0 +1,32 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: build-trigger-cron-sa
+  namespace: resume-site
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: build-trigger-role
+  namespace: flux-builds
+rules:
+- apiGroups: ["batch"]
+  resources: ["jobs"]
+  verbs: ["create", "get", "list", "delete"]
+- apiGroups: [""]
+  resources: ["pods", "pods/log"]
+  verbs: ["get", "list"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: build-trigger-binding
+  namespace: flux-builds
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: build-trigger-role
+subjects:
+- kind: ServiceAccount
+  name: build-trigger-cron-sa
+  namespace: resume-site