feat(helm): complete chart normalization with ConfigMap, HPA, and OCI migration

- Added debug mode, structured ConfigMap pattern, and README to all charts
- Migrated all flat-structure charts to hierarchical values under chartname key
- Fixed templates to use correct hierarchical paths
- Renamed helm-rustical key to rustical, added HPA support
- Fixed ingress YAML parsing (oxicloud), nested env vars (rustical)
- Pushed all normalized charts to OCI registry as 1.0.0+ and updated ArgoCD apps

k8s/charts/helm-rustical/templates/hpa.yaml

@@ -0,0 +1,36 @@
+{{- if .Values.rustical.autoscaling.enabled }}
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "rustical.fullname" . }}
+  labels:
+    {{- include "rustical.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: StatefulSet
+    name: {{ include "rustical.fullname" . }}
+  {{- if .Values.rustical.autoscaling.minReplicas }}
+  minReplicas: {{ .Values.rustical.autoscaling.minReplicas }}
+  {{- end }}
+  {{- if .Values.rustical.autoscaling.maxReplicas }}
+  maxReplicas: {{ .Values.rustical.autoscaling.maxReplicas }}
+  {{- end }}
+  metrics:
+    {{- if .Values.rustical.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.rustical.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.rustical.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.rustical.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}