[refactor] Use batch_encode_into/batch_decode_from for Yuanrong backend

[dpj135]

Decription

Adjust logics of yuanrong_client based on #107 .

• raplace pack_into/encode with batch_encode_into.
• replace unpack_from/decode with batch_decode_from

[ascend-robot]

CLA Signature Pass

dpj135, thanks for your pull request. All authors of the commits have signed the CLA. 👍

[ascend-robot]

CLA Signature Pass

dpj135, thanks for your pull request. All authors of the commits have signed the CLA. 👍

[Copilot]

Pull request overview

This PR updates the Yuanrong general KV zero-copy serialization path to use the shared batch serialization helpers introduced in #107.

Changes:

• Replaces local pack/unpack helpers with batch_encode_into / batch_decode_from.
• Adjusts Yuanrong zero-copy set/get flow to allocate DataSystem buffers through the batch encoder.
• Updates the Yuanrong zero-copy test mocks to patch shared serialization entry points.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
transfer_queue/storage/clients/yuanrong_client.py	Uses shared batch serialization helpers for general KV zero-copy storage and retrieval.
tests/test_yuanrong_client_zero_copy.py	Updates test serialization/deserialization mocks for the new batch helper path.

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