apollo_batcher: debug-log compressed byte size of committer-returned commitment infos

[itamar-starkware]

No description provided.

[cursor]

PR Summary

Low Risk
Debug-only logging behind existing tracing; no behavior or data-path changes.

Overview
Adds a debug! trace in the os_input ReadPathsAndCommitBlock path right after the committer responds, so operators can see how many bytes of compressed state commitment infos came back for each block height.

This is observability only: no change to commitment handling, retries, or what gets passed downstream.

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[reviewable-StarkWare]

This change is 

[itamar-starkware]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• apollo_batcher: debug-log compressed byte size of committer-returned commitment infos #14891 👈 (View in Graphite)
• apollo_dashboard: alert on committer block number lag and block commit latency #14890
• apollo_committer: add per-block commit latency histogram metric #14889
• apollo_committer,apollo_committer_config: warn when block commit exceeds duration threshold #14888
• main

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[yoavGrs]

@yoavGrs reviewed 1 file and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on itamar-starkware).