Add NodePort service to expose ClickHouse externally

HTTP on port 30123, native protocol on port 30900. Keeps the existing
headless service for internal StatefulSet DNS.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deploy/clickhouse.yaml

@@ -64,3 +64,22 @@ spec:
     - port: 9000
       targetPort: 9000
       name: native
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: clickhouse-external
+  namespace: cameleer
+spec:
+  type: NodePort
+  selector:
+    app: clickhouse
+  ports:
+    - port: 8123
+      targetPort: 8123
+      nodePort: 30123
+      name: http
+    - port: 9000
+      targetPort: 9000
+      nodePort: 30900
+      name: native