fix(batcher): include checksum in zlib-compressed channel encoding

[0xbenyun]

Description

This PR addresses an issue in the batcher where the checksum was not being included during the compression of rlp_spanbatches using zlib. The checksum is now correctly included in the compressed data.

This work originated from an investigation into a derivation failure observed in Kona, during which it was discovered that the checksum was missing in the compressed output.

Additionally, a related upstream PR #10002, primarily focused on optimization and refactoring, also resolved this checksum issue as part of its broader changes.

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[kangsorang]

I think the batch derivation process involves a read through zlib.Reader and that includes checksum verification.
I'm curious to know how BatchReader's behavior has passed this checksum issue so far.

[sm-stack]

LGTM

[0xbenyun]

I think the batch derivation process involves a read through zlib.Reader and that includes checksum verification. I'm curious to know how BatchReader's behavior has passed this checksum issue so far.

I have confirmed that the zlib.Reader in Go does not always verify the checksum in all cases. Therefore, in BatchReader, it performs decompression without checking the checksum, regardless of its presence.

[kangsorang]

LGTM