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/values.yaml

@@ -0,0 +1,37 @@
+replicaCount: 1
+
+image:
+  repository: redis
+  pullPolicy: IfNotPresent
+  tag: ""  # defaults to Chart.AppVersion
+
+nameOverride: ""
+fullnameOverride: ""
+
+auth:
+  enabled: true
+  existingSecret: ""
+  passwordKey: REDIS_PASSWORD
+
+persistence:
+  enabled: false
+  existingClaim: ""
+  storageClass: local-path
+  size: 1Gi
+
+service:
+  type: ClusterIP
+  port: 6379
+  nodePort: ""
+
+resources:
+  requests:
+    memory: 128Mi
+    cpu: 50m
+  limits:
+    memory: 256Mi
+    cpu: 200m
+
+nodeSelector: {}
+affinity: {}
+tolerations: []