refactor(argocd): replace wave/layer/phase schemes with two-phase bootstrap + app-of-apps and document both CD scopes — fixes self-hosted-git chicken-egg and stale paths

k8s/argocd/root/kustomization.yaml

@@ -3,13 +3,8 @@ kind: Kustomization
 metadata:
   name: homelab-root
 
-# Root Application orchestration
-# Includes all layer Applications in order (sync-wave)
-
+# Phase 1 app-of-apps entry point.
+# `kubectl apply -k k8s/argocd/root` creates the homelab-root Application, which
+# then renders every child under k8s/argocd/apps/ and deploys the cluster.
 resources:
-  - ../apps/layer-1-infrastructure.yaml
-  - ../apps/layer-2-bootstrap.yaml
-  - ../apps/layer-3-platform.yaml
-  - ../apps/layer-4-security.yaml
-  - ../apps/layer-5-applications.yaml
-  - ../apps/layer-6-data.yaml
+  - homelab-root.yaml