fp.serial registry with smart-button traceability (SO, MO, Delivery,
Invoice, Part), fp.coating.thickness child table per coating config,
four new fields on sale.order.line propagating through to MO /
Delivery / Invoice via existing hooks. Revision picker with latest-
only default + switcher + snapshot Char. Reports pick up all four
via Sub 2's customer-line-header macro.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>