v1.8.21 — snapshot-delete gains the flag its docs already promised
The reference documented vm snapshot-delete <name> --name <snap> [--remove-children]. The option did not exist, so following the documentation
got "No such option" — while the capability was real all along: the ops layer
takes remove_children and the MCP tool exposes it. Only the CLI never passed
it through. It reaches the --dry-run preview too, so the difference is visible
before the delete rather than after.