fix(gateways): add explicit group/kind/weight to all HTTPRoute refs (#162)

## Summary

- Adds `group: gateway.networking.k8s.io` and `kind: Gateway` to all `parentRefs` entries
- Adds `group: ""`, `kind: Service`, and `weight: 1` to all `backendRefs` entries
- Affects 9 HTTPRoute files across artifactapi, cattle-system, consul, kanidm, litellm, paperclip, puppet, and vault

## Why

ArgoCD diffs the desired manifest against the live Kubernetes object. The Gateway API controller defaults these fields when creating/updating objects, so the live state always has them — causing persistent OutOfSync for every HTTPRoute. Same root cause as #153 (certificateRefs).

## Test plan

- [ ] All affected ArgoCD applications show Synced after merge

Reviewed-on: #162

apps/base/puppet/httproute_puppetdb.yaml

@@ -13,12 +13,17 @@ spec:
   hostnames:
     - puppetdb.k8s.syd1.au.unkin.net
   parentRefs:
-    - name: puppetdb
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: puppetdb
       sectionName: https
   rules:
     - backendRefs:
-        - name: puppetdb
+        - group: ""
+          kind: Service
+          name: puppetdb
           port: 8080
+          weight: 1
       matches:
         - path:
             type: PathPrefix