CleanupInactiveSupplierProjectsJob Phase A/B/C subquery determined
active supplier_projects through legacy supplier_b{1,2,3}_project_id FKs,
which are NULL for Plan 3+ projects (using project_supplier_links pivot).
After 180d TTL these supplier_projects would be deleted from supplier,
breaking real lead flow. Subquery now uses pivot.
Дмитрий