Let terraform-authentik read the vlogs OIDC client secret

vlogs is the first app to need a second OIDC secret in a namespace that
already has one, so the one-per-namespace oauth-credentials wildcard does
not cover it and the authentik plan fails on a denied kv read.

- grant read on kv/kubernetes/namespace/logging/default/vlogs-oauth-credentials

policies/kv/service/terraform/authentik.yaml

@@ -10,6 +10,11 @@ rules:
   - path: "kv/data/kubernetes/namespace/+/default/oauth-credentials"
     capabilities:
       - read
+  # Second OIDC client in an already-onboarded namespace, so it cannot use the
+  # one-per-namespace oauth-credentials path above.
+  - path: "kv/data/kubernetes/namespace/logging/default/vlogs-oauth-credentials"
+    capabilities:
+      - read
 
 auth:
   approle: