Add primary (write) Services to the authoritative + externaldns clusters

Writes (RFC2136/nsupdate) must hit pod-0; the round-robin read Service
would land them on a secondary. Add a dedicated write endpoint per
cluster (operator v0.1.5 primaryService field).

- bind-authoritative: LoadBalancer write endpoint on 198.18.200.9
- bind-externaldns: ClusterIP write endpoint (in-cluster writers)
- regenerate bindcluster kubeconform schema (primaryService +
  externalTrafficPolicy)

external-dns is NOT yet repointed at bind-externaldns-primary: it
authenticates with the existing key, which the operator-generated key
doesn't match until the planned Vault-sync / secret-reflection features
land.

apps/base/bind-internal/authoritative/cluster.yaml

@@ -18,10 +18,17 @@ spec:
     - "allow-query { auth-acl-main; 10.42.0.0/16; }"
   service:
     type: LoadBalancer
+    externalTrafficPolicy: Local
     annotations:
       purelb.io/service-group: common
       purelb.io/addresses: 198.18.200.6
       external-dns.alpha.kubernetes.io/hostname: bind-authoritative.k8s.syd1.au.unkin.net
+  primaryService:
+    type: LoadBalancer
+    annotations:
+      purelb.io/service-group: common
+      purelb.io/addresses: 198.18.200.9
+      external-dns.alpha.kubernetes.io/hostname: bind-authoritative-primary.k8s.syd1.au.unkin.net
   resources:
     requests:
       cpu: 100m

apps/base/bind-internal/externaldns/cluster.yaml

@@ -14,10 +14,13 @@ spec:
   storageSize: 1Gi
   service:
     type: LoadBalancer
+    externalTrafficPolicy: Local
     annotations:
       purelb.io/service-group: common
       purelb.io/addresses: 198.18.200.8
       external-dns.alpha.kubernetes.io/hostname: bind-externaldns.k8s.syd1.au.unkin.net
+  primaryService:
+    type: ClusterIP
   resources:
     requests:
       cpu: 100m

apps/base/bind-internal/resolvers/cluster.yaml

@@ -13,6 +13,7 @@ spec:
   storageSize: 1Gi
   service:
     type: LoadBalancer
+    externalTrafficPolicy: Local
     annotations:
       purelb.io/service-group: common
       purelb.io/addresses: 198.18.200.7

apps/base/bind-system/deployment.yaml

@@ -21,7 +21,7 @@ spec:
         runAsNonRoot: true
       containers:
         - name: operator
-          image: git.unkin.net/unkin/bind-operator:v0.1.4
+          image: git.unkin.net/unkin/bind-operator:v0.1.5
           args:
             - --metrics-bind-address=:8080
             - --health-probe-bind-address=:8081

apps/base/bind-system/kustomization.yaml

@@ -6,6 +6,6 @@ resources:
   - namespace.yaml
   # CRDs are pulled from the bind-operator repo at the matching tag rather than
   # vendored here, so they never drift from the operator.
-  - https://git.unkin.net/unkin/bind-operator/raw/tag/v0.1.3/config/crd/install.yaml
+  - https://git.unkin.net/unkin/bind-operator/raw/tag/v0.1.5/config/crd/install.yaml
   - rbac.yaml
   - deployment.yaml

schemas/bind.unkin.net/bindcluster_v1alpha1.json

@@ -692,6 +692,35 @@
           },
           "type": "object"
         },
+        "primaryService": {
+          "properties": {
+            "annotations": {
+              "additionalProperties": {
+                "type": "string"
+              },
+              "type": "object"
+            },
+            "externalTrafficPolicy": {
+              "enum": [
+                "Cluster",
+                "Local"
+              ],
+              "type": "string"
+            },
+            "loadBalancerIP": {
+              "type": "string"
+            },
+            "type": {
+              "enum": [
+                "ClusterIP",
+                "LoadBalancer",
+                "NodePort"
+              ],
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
         "recursion": {
           "type": "boolean"
         },
@@ -765,6 +794,13 @@
               },
               "type": "object"
             },
+            "externalTrafficPolicy": {
+              "enum": [
+                "Cluster",
+                "Local"
+              ],
+              "type": "string"
+            },
             "loadBalancerIP": {
               "type": "string"
             },