Establish clean homelab infrastructure baseline

Reorganize the brownfield repository, remove retired and generated artifacts, harden ignore rules, and record the GitOps/IaC redesign.

infrastructure/proxmox/ansible/roles/pve_cluster/defaults/main.yml

@@ -0,0 +1,11 @@
+---
+pve_cluster_name: homelab
+
+# The node that runs `pvecm create`; everyone else joins it. pve1 is also the
+# intended LINSTOR controller (most RAM of the three).
+pve_cluster_primary: pve1
+
+# Corosync link address per node. Single flat 1G LAN on one unmanaged switch, so
+# there is exactly one ring. A dedicated corosync ring would need a second NIC
+# (mini-PCIe) plus another switch — noted as a future upgrade, not done here.
+pve_cluster_link0: "{{ ansible_host }}"