feat(redis): add own Redis chart

Replaces the Bitnami OCI chart wrapper previously used directly from
the k3s repo (apps/redis). Standalone Deployment, password auth via
existingSecret, optional persistence (defaults to emptyDir to match
current usage as an ephemeral cache/session store).

redis/templates/service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "redis.fullname" . }}
+  labels:
+    {{- include "redis.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  selector:
+    {{- include "redis.selectorLabels" . | nindent 4 }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: {{ .Values.service.port }}
+      protocol: TCP
+      {{- if and (eq .Values.service.type "NodePort") .Values.service.nodePort }}
+      nodePort: {{ .Values.service.nodePort }}
+      {{- end }}