Users need to enter parts/stock and get results without a disconnected
inventory system to manage; StockItem.QuantityOnHand and StockTransaction
today aren't read or written by the job workflow anywhere except an
auto-discovery fallback that silently assumes unlimited purchasing.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Scopes out Supplier, SupplierOffering, PurchaseItem, and cost tracking
as out-of-scope for a 1D nesting optimizer, while fixing the actual
reported bug (read-only stock length field) and keeping a stripped
quantity-only transaction log.