Prompt Book Errata Afteruse Review

Branches: certify_errata_scope, split_errata_from_original_cue, attach_margin_provenance_note, notify_excluded_performer_reader, convert_to_route_annotation, quarantine_uncited_errata_copy, false_clean_errata_default, plus future_effect_any coverage through branch metadata.

Every branch changes a named future-reader effect and at least three counters. None grants universal prompt-book authority.