Initial import: phase docs, configs, Claude conventions

Phase 1-3 runbooks and design notes, version pins, config templates,
project-history conventions, cluster-inspector read-only credentials setup.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

configs/capi/clusterctl.yaml.example

@@ -0,0 +1,26 @@
+# copy to ~/.cluster-api/clusterctl.yaml — never commit the real file
+## controller
+PROXMOX_URL: "https://192.168.0.8:8006"
+PROXMOX_TOKEN: "capmox@pve!capi"
+PROXMOX_SECRET: "<secret>"
+
+## workload defaults
+PROXMOX_SOURCENODE: "pv1-1"               # node holding the template
+TEMPLATE_VMID: "<vmid of ubuntu-2404-kube-v1.35.9>"
+ALLOWED_NODES: "[pv1-1]"                  # more nodes only with shared storage
+VM_SSH_KEYS: "ssh-ed25519 AAAA..."
+
+## network (VLAN 4 on vmbr0 — add `vlan: 4` to the network device in ProxmoxMachineTemplates)
+CONTROL_PLANE_ENDPOINT_IP: "<free IP in VLAN 4>"
+NODE_IP_RANGES: "[<first>-<last>]"
+GATEWAY: "<gw>"
+IP_PREFIX: "24"
+DNS_SERVERS: "[<dns>]"
+BRIDGE: "vmbr0"
+
+## sizing defaults (workers overridden in lab1.yaml)
+BOOT_VOLUME_DEVICE: "scsi0"
+BOOT_VOLUME_SIZE: "40"
+NUM_SOCKETS: "1"
+NUM_CORES: "2"
+MEMORY_MIB: "4096"