fix(kanidm): add explicit group/kind/weight to TLSRoute refs (#165)

## Summary

- Adds `group: gateway.networking.k8s.io` and `kind: Gateway` to `parentRefs`
- Adds `group: ""`, `kind: Service`, and `weight: 1` to `backendRefs`

## Why

The Gateway API controller defaults these fields when creating/updating TLSRoute objects, so the live state always has them. ArgoCD diffs desired vs live by string comparison, causing the `kanidm` TLSRoute to show permanent OutOfSync. Same root cause as #162 (HTTPRoutes).

Reviewed-on: #165

apps/base/kanidm/tlsroute.yaml

@@ -13,9 +13,14 @@ spec:
     - auth.unkin.net
     - au.auth.unkin.net
   parentRefs:
-    - name: kanidm
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: kanidm
       sectionName: https-passthrough
   rules:
     - backendRefs:
-        - name: kanidm
+        - group: ""
+          kind: Service
+          name: kanidm
           port: 8443
+          weight: 1