Add self-contained API simulators lab with Compose and Helm.

Ship Proxmox, oVirt, VMware, and OpenStack behind one Postgres stack,
Makefile helpers (up/clean/helm up|down/push), and a Helm chart with
namespace, Let's Encrypt ingresses, migrate inits, and skip-if-seeded jobs.

charts/api-simulators-lab/templates/postgres-configmap.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.postgres.enabled }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "lab.fullname" . }}-postgres-init
+  namespace: {{ include "lab.namespace" . }}
+  labels:
+    {{- include "lab.labels" . | nindent 4 }}
+    app.kubernetes.io/component: postgres
+data:
+  01-simulators.sql: |
+{{- range .Values.postgres.initDatabases }}
+    CREATE USER {{ .user }} WITH PASSWORD '{{ .password }}';
+    CREATE DATABASE {{ .database }} OWNER {{ .user }};
+
+{{- end }}
+{{- end }}