T-0.5 Kyverno L0 policies + CLI tests + admission scaffolding (R-TEST-01, R-NET-01, R-SEC-01/02, R-IDP-02, R-GITOPS-02)

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

platform/kyverno/servicedefinition/payloads/invalid-missing-image.yaml

@@ -0,0 +1,9 @@
+# INVALID: kind 'container' but no source.image (docs/13 requires an image ref for
+# container kind). Rejected.
+name: noimage
+kind: container
+source: {}
+exposure: internal
+egress: internet
+auth:
+  mode: forward-auth