feat(derive): BatchValidator stage

[clabby]

Overview

Adds a new stage to take place of the BatchQueue after Holocene activation, the BatchValidator. This stage's only role is to consume the SingleBatches from the BatchStream, validate them, and send them off to the AttributesQueue.

This PR does not hook this stage up to a multiplexer stage with the BatchQueue, and that will be done in a follow-up.

[codecov]

Codecov Report

Attention: Patch coverage is 94.98861% with 22 lines in your changes missing coverage. Please review.

Project coverage is 94.3%. Comparing base (5ae6a53) to head (30c78f5).
Report is 3 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/derive/src/stages/batch/batch_validator.rs	94.9%	22 Missing ⚠️

Additional details and impacted files

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[refcell]

Looks good but it seems like there's a lot of duplicate logic with the batch_queue. Is it not possible to de-dup into a split out validator that holds the l1 blocks? Happy to allow any enhancements to be follow on since this works.