PASS: configured airport parsing, bounded readiness, stale admission rejection and cleanup wiring
PASS: automatic default, explicit header/CLI opt-out, editor/authored-mode guards, optional airport override precedence and fresh-round saving guard
PASS: singleton identity guards, paired faction deserialization and client world-cleanup wiring
PASS: task/map/respawn getters survive delayed old destruction and preserve ordinary-mode behavior
PASS: replication hierarchy refuses absent/aliased nodes and establishes delivery dependencies idempotently
PASS: standalone old faction delegates collected once, with null/deleted owners ignored
PASS: actual terrain takeover startup skips mode-less/menu worlds, always forwards super, retains eligible/unsupported/authored/client/editor semantics