Bump kea images to v0.1.3 (HA peer DNS startup wait) (#344)

## Why
kea-dhcp4 crash-loops on a cold container start: the HA hook resolves the StatefulSet peer URL hostnames once at config load, but the peer DNS records aren't resolvable in the first instant of a fresh container, and kea exits hard instead of retrying. Verified in-cluster that the rendered config validates once DNS is warm, so it's a startup race. kea-operator v0.1.3 gates dhcp4 startup on a bounded `kea-dhcp4 -t` retry (~120s, then proceeds/fails loud).

## How
- bump kea-operator, kea, and kea-api images to v0.1.3

---------

Co-authored-by: Ben Vincent <neotheo@gmail.com>
Reviewed-on: #344
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>

apps/base/dhcp-system/cr/keaapi.yaml

@@ -11,7 +11,7 @@ metadata:
     argocd.argoproj.io/sync-wave: "1"
 spec:
   replicas: 1
-  image: git.unkin.net/unkin/kea-api:v0.1.2
+  image: git.unkin.net/unkin/kea-api:v0.1.3
   tokenSecretName: kea-api-token
   service:
     type: ClusterIP

apps/base/dhcp-system/cr/keacluster.yaml

@@ -11,7 +11,7 @@ metadata:
     argocd.argoproj.io/sync-wave: "1"
 spec:
   replicas: 2
-  image: git.unkin.net/unkin/kea:v0.1.2
+  image: git.unkin.net/unkin/kea:v0.1.3
   domainName: main.unkin.net
   defaultLeaseTime: 1200
   maxLeaseTime: 86400

apps/base/dhcp-system/deployment.yaml

@@ -21,7 +21,7 @@ spec:
         runAsNonRoot: true
       containers:
         - name: operator
-          image: git.unkin.net/unkin/kea-operator:v0.1.2
+          image: git.unkin.net/unkin/kea-operator:v0.1.3
           args:
             - --metrics-bind-address=:8080
             - --health-probe-bind-address=:8081