automation-controller: automation-controller: unauthenticated /api/v2/ping/ discloses automation-mesh instance topology and instance-group membership

A flaw was found in the automation-controller API. The unauthenticated health-check endpoint /api/v2/ping/ ApiV2PingView, AllowAny over-serializes RBAC-gated automation-mesh data into its anonymous response, exposing the full instance inventory node hostnames, node types, UUIDs, heartbeats,...