Rename a snapshot. name is optional — if omitted or empty, the server regenerates the auto-name (snapshot-<8-char-vmId-prefix>).
Updated snapshot
Free-form string→string map. Server-enforced limits: up to 256 keys, key length 1–256 bytes, value length ≤4096 bytes, total JSON encoding ≤65536 bytes.
Snapshot lifecycle status. Known values: creating, ready, error. Additional values may be introduced in future server versions.