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/cluster-autoscaler/values.yaml

@@ -0,0 +1,17 @@
+# helm install ca autoscaler/cluster-autoscaler --version 9.59.0 -n default -f values.yaml
+# must be installed in the same namespace as the <cluster>-kubeconfig secret
+cloudProvider: clusterapi
+clusterAPIMode: kubeconfig-incluster      # workload via kubeconfig, management in-cluster
+clusterAPIKubeconfigSecret: lab1-kubeconfig
+autoDiscovery:
+  clusterName: lab1
+  namespace: default
+image:
+  tag: v1.35.2                            # chart default appVersion is 1.35.0
+extraArgs:
+  expander: least-waste
+  scale-down-unneeded-time: 5m
+  scale-down-delay-after-add: 5m
+  scale-down-utilization-threshold: "0.5"
+  balance-similar-node-groups: true
+  v: 4