docs: update docs based on recent Benthos changes

[josephwoodward]

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[claude]

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Commits

LGTM

Review

Documentation-only change adding cross-references to the split processor in four processor docs (archive, group_by, group_by_value, unarchive). Each addition is a helpful hint guiding users on how to further process batched/grouped/unarchived messages individually.

LGTM

[claude]

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[claude]

Claude finished @josephwoodward's task in 32s —— View job

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Commits

LGTM

Review

Documentation-only changes adding cross-references to the split processor in four processor docs (archive, group_by, group_by_value, unarchive), plus removal of unnecessary driver := driver loop variable captures in internal/impl/sql/integration_test.go (correct for Go 1.22+).

LGTM