architecture_lane=content_collection phase=architecture_lane_content_collection_closure admission=admitted_and_closed canonical_app_block=content.collection canonical_contract=src/domain/collections/contract.py dataset_backed=yes bounded_core_composition=yes dedicated_cloud_store=no new_entity_family=no record_persistence=no taxonomy_engine=no domain_lifecycle=no events=no protected_semantics=dataset_membership,routing,filtering,sorting,pagination,presentation fast_lane_ready=yes next_architecture_family=not_yet_selected selection_action=content_collection_closed