chore(images): pin service image updates

Replace floating service images with reviewable tags or digests.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

kener/k8s/kener.yaml

@@ -27,7 +27,7 @@ spec:
     spec:
       containers:
         - name: kener
-          image: rajnandan1/kener:4.1.0
+          image: rajnandan1/kener:4.1.5
           envFrom:
             - configMapRef:
                 name: kener-config

kener/k8s/redis.yaml

@@ -30,7 +30,7 @@ spec:
     spec:
       containers:
         - name: redis
-          image: redis:7-alpine
+          image: redis:7.4.11-alpine
           ports:
             - containerPort: 6379
           volumeMounts: