fix: codec v7 version field

[shu-unifra]

No description provided.

[Copilot]

Pull request overview

This PR modifies the v7 blob decoding logic to pass the version byte through to the payload decoder and use it when constructing the Batch object, rather than hardcoding version 7. This allows the decoder to correctly handle v8/v9/v10 blobs using the same decoding logic. A new test verifies that v8 blobs can be decoded with the correct version preserved.

• Modified decode_v7_payload to accept a version parameter
• Updated Batch::new call to use the dynamic version instead of hardcoded 7
• Added test case to verify v8 blob decoding

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[yiweichi]

Could you fix the lint by running: cargo fmt --all

[codspeed-hq]

CodSpeed Performance Report

Merging #456 will not alter performance

_{Comparing unifralabs:main (a6d7828) with main (8c1f7d1)}

Summary

✅ 2 untouched

[yiweichi]

Closed by this #459