Argo has incomplete fix for CVE-2026-31892: hostNetwork, securityContext, serviceAccountName bypass templateReferencing Strict/Secure

The fix for CVE-2026-31892 commit 534f4ff blocks podSpecPatch when templateReferencing: Strict is active, but doesn't restrict other WorkflowSpec fields that flow through the same merge path and get applied to pods. A user can set hostNetwork: true, override serviceAccountName, or change...