fix(derive): BatchStream Past batch handling

[clabby]

Overview

Fixes the handling of the BatchValidity::Past condition. It's currently throwing a temporary Eof, but the desired behavior is to continue reading old batches until all past batches have been read, validated, and discarded due to their timestamp.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 90.5%. Comparing base (7a40d87) to head (80e304e).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/derive/src/stages/batch/batch_stream.rs	0.0%	1 Missing ⚠️

Additional details and impacted files

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[Inphi]

is/will there be an action test covering this case?

[clabby]

is/will there be an action test covering this case?

Not yet, but set a reminder to get one in once I'm back to work.