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_post_install/handlers/main.yml

@@ -0,0 +1,15 @@
+---
+- name: Refresh apt cache
+  ansible.builtin.apt:
+    update_cache: true
+  register: _h_apt
+  retries: 3
+  delay: 15
+  until: _h_apt is succeeded
+
+- name: Restart pveproxy
+  # Serves the web UI; picks up the patched proxmoxlib.js. Does NOT interrupt
+  # running guests.
+  ansible.builtin.systemd_service:
+    name: pveproxy
+    state: restarted