The Schriftsätze list rendered procedurally meaningless: Berufungsbegründung
ahead of Klageerhebung etc. because the ORDER BY was alphabetic by
submission_code within each proceeding. Add dr.sequence_order ASC as the
primary intra-proceeding sort; submission_code stays as the deterministic
tiebreaker for rules sharing a sequence_order.
deadline_rules.sequence_order is already populated for every published
filing rule (verified via paliad.deadline_rules_unified). Pure read-side
fix; no schema or data change.