Add Harbor/Ceph runbooks and align single-node Ceph docs with abr deployment.

Document registry ingress split, image mirroring, loop OSD setup, and platform integration paths.

backend/helm/cloudhost-ceph/scripts/uninstall.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# Remove CloudHost extras + Rook cluster + operator (DATA LOSS).
+set -euo pipefail
+
+read -r -p "This deletes ALL Ceph data. Type 'delete-ceph' to continue: " CONFIRM
+if [[ "${CONFIRM}" != "delete-ceph" ]]; then
+  echo "Aborted."
+  exit 1
+fi
+
+helm uninstall cloudhost-ceph -n cloudhost-builds 2>/dev/null || true
+helm uninstall rook-ceph-cluster -n rook-ceph 2>/dev/null || true
+helm uninstall rook-ceph -n rook-ceph 2>/dev/null || true
+
+echo "Waiting for Rook resources to terminate..."
+sleep 15
+kubectl -n rook-ceph get pods 2>/dev/null || true
+
+cat <<'EOF'
+
+IMPORTANT: On each node, wipe Rook state before reinstalling:
+  sudo rm -rf /var/lib/rook
+  sudo rm -rf /var/lib/rook/osd
+
+For raw-disk OSDs also zap disks (see RUNBOOK-CEPH.fa.md).
+EOF