efcdd18794
Adds `cached-call retry` and `cached-call discard` subcommands that relay to the existing Deployer-gated RetryParkedMessageCommand / DiscardParkedMessageCommand via the central SiteCallAuditActor → site relay. ManagementCommandRegistry already covered both types via reflection auto-discovery. CommandTreeTests updated to include cached-call (group count 16 → 17).