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Add support for CNS QueryVolumeInfo API in cns client and simulator

Add support for CNS QueryVolumeInfo API in cns client and simulator: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). The cns.Client currently exposes QueryVolume and QueryAllVolume , but both return CnsVolume entries that don't include the underlying VStorageObject…

The task

The `cns.Client` currently exposes `QueryVolume` and `QueryAllVolume`, but both return `CnsVolume` entries that don't include the underlying `VStorageObject` details (backing file path, capacity, policy, etc.).

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.