Retire Starter-Kit-Stufen ohne Strang beim Progression-Demo; active_work_gates zählt nur stranggebundene Gates wenn Join existiert. E2E-Test an maturity_transition-Struktur angepasst. Co-authored-by: Cursor <cursoragent@cursor.com>
join_gate, strand_project_id, Join-Auto-Schalten, multi-active Gates, Progression-Demo und PO-Lock-Spec. FE: Today strang-gruppiert, Join-Warteliste in Kontrolle. Co-authored-by: Cursor <cursoragent@cursor.com>