Ten-task plan ordered so the build stays green at each step: strip
consumers first (StockItemService/DTOs/Controller, Stock/Edit.razor,
Suppliers/Orders pages, Jobs/Edit.razor, CatalogService), delete the
now-unused services, then remove the entities and migrate the schema
last. Closes with CutList.Mcp cleanup and a manual smoke test.
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.
aj