Fix gitea-http Service targetPort (chart renders null)

The chart leaves the http Service targetPort null (defaults to the port name,
which kustomize drops), failing strict kubeconform. Pin it to 3000 via a
kustomize patch.

Claude-Session: https://claude.ai/code/session_015ur3i7D2azsMAWTSVABApv

apps/overlays/au-syd1/gitea/kustomization.yaml

@@ -27,3 +27,14 @@ patches:
       kind: Pod
       metadata:
         name: gitea-test-connection
+  # The chart renders the http Service with `targetPort: null` (it defaults the
+  # target to the port name, which kustomize drops); pin it to 3000 so the
+  # manifest is valid and the HTTPRoute backend resolves.
+  - target:
+      version: v1
+      kind: Service
+      name: gitea-http
+    patch: |-
+      - op: replace
+        path: /spec/ports/0/targetPort
+        value: 3000