Phase 2: deploy Gitea warm standby on the VPS

Pull-mirrors home GitLab's Homelabv4 repo on Gitea's own built-in mirror
scheduler (6h interval) - no custom sync job needed, per the original
plan. SQLite instead of the chart's default HA Postgres + Valkey cluster
(single-instance standby holding one small repo, not worth the extra
moving parts). A PostSync Job creates the mirror once, idempotently;
Gitea's scheduler handles all ongoing pulls after that.

Also added a public Cloudflare CNAME for gitlab.kube.huskypup.net ->
home.kube.huskypup.net: the VPS has no route to home's LAN via Netbird
(none of the mesh peers advertise that subnet, confirmed live), so
GitLab needs to be reachable the same way any other internet client
reaches it - home's public IP already has port 443 forwarded to
istio-ingressgateway from earlier this session.

Admin and GitLab-mirror credentials are plain Secrets created directly
on the VPS cluster (kubectl, not git) - same pattern as vault-unseal-key.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

infrastructure/vps-standby/gitea/manifests/setup-mirror-job.yaml

@@ -0,0 +1,104 @@
+---
+# One-time setup of a pull-mirror repo in Gitea, pointing at the home
+# GitLab GitOps repo. Gitea's own built-in mirror scheduler handles the
+# ongoing periodic pulls after this (configured via gitea.config.mirror
+# in values.yaml, DEFAULT_INTERVAL: 6h) - this job just creates the
+# mirrored repo once, idempotently (skips if it already exists).
+#
+# GitLab credentials for the mirror source are a plain Secret created
+# directly on this cluster (kubectl, not git):
+#   kubectl -n gitea create secret generic gitlab-mirror-credentials \
+#     --from-literal=username=<gitlab user> --from-literal=password=<PAT>
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: gitea-setup-mirror
+  namespace: gitea
+  annotations:
+    argocd.argoproj.io/hook: PostSync
+    argocd.argoproj.io/hook-delete-policy: BeforeHookCreation
+spec:
+  backoffLimit: 3
+  template:
+    spec:
+      restartPolicy: Never
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 65534
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: setup-mirror
+          image: curlimages/curl:8.10.1
+          securityContext:
+            allowPrivilegeEscalation: false
+            capabilities:
+              drop: ["ALL"]
+          command:
+            - /bin/sh
+            - -c
+            - |
+              set -eu
+
+              # Service name follows the Helm release name (vps-gitea).
+              GITEA_URL="http://vps-gitea-http.gitea.svc.cluster.local:3000"
+              REPO_OWNER="gitea_admin"
+              REPO_NAME="Homelabv4"
+
+              echo "==> Waiting for Gitea API..."
+              for i in $(seq 1 30); do
+                if curl -sf "${GITEA_URL}/api/v1/version" >/dev/null 2>&1; then
+                  break
+                fi
+                sleep 5
+              done
+
+              echo "==> Checking if mirror repo already exists..."
+              EXISTS=$(curl -s -o /dev/null -w '%{http_code}' \
+                -u "${GITEA_ADMIN_USER}:${GITEA_ADMIN_PASS}" \
+                "${GITEA_URL}/api/v1/repos/${REPO_OWNER}/${REPO_NAME}")
+
+              if [ "$EXISTS" = "200" ]; then
+                echo "==> Mirror repo already exists, nothing to do."
+                exit 0
+              fi
+
+              echo "==> Creating pull-mirror repo from GitLab..."
+              curl -sf -X POST \
+                -u "${GITEA_ADMIN_USER}:${GITEA_ADMIN_PASS}" \
+                -H "Content-Type: application/json" \
+                "${GITEA_URL}/api/v1/repos/migrate" \
+                -d "{
+                  \"clone_addr\": \"https://gitlab.kube.huskypup.net/Scooby/Homelabv4.git\",
+                  \"repo_name\": \"${REPO_NAME}\",
+                  \"repo_owner\": \"${REPO_OWNER}\",
+                  \"mirror\": true,
+                  \"mirror_interval\": \"6h\",
+                  \"private\": false,
+                  \"auth_username\": \"${GITLAB_USER}\",
+                  \"auth_password\": \"${GITLAB_TOKEN}\",
+                  \"service\": \"gitlab\"
+                }"
+
+              echo "==> Done."
+          env:
+            - name: GITEA_ADMIN_USER
+              valueFrom:
+                secretKeyRef:
+                  name: gitea-admin-secret
+                  key: username
+            - name: GITEA_ADMIN_PASS
+              valueFrom:
+                secretKeyRef:
+                  name: gitea-admin-secret
+                  key: password
+            - name: GITLAB_USER
+              valueFrom:
+                secretKeyRef:
+                  name: gitlab-mirror-credentials
+                  key: username
+            - name: GITLAB_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: gitlab-mirror-credentials
+                  key: password