Adds the production cluster foundation (authored + applied live on node1):
- cert-manager via the k3s HelmChart controller + letsencrypt staging/prod
ClusterIssuers (HTTP-01 / Traefik).
- Longhorn config for single-node (values: replica=1, default StorageClass,
Retain) + backup-to-Hetzner-Object-Storage credential template.
- In-cluster data tier (dezky-data): Postgres 16 (with Authentik+OCIS DB init),
MongoDB 7, Redis 7 as StatefulSets on Longhorn, + secret template.
- bootstrap.sh: install open-iscsi/nfs-common + enable iscsid (Longhorn prereq).
- RUNBOOK.md: full reproducible node1 build order.
Real secrets are generated on-box and kept in Bitwarden — never in git.