ALTER TABLE `invoice_lines` ADD `sourceSaleItemId` int;--> statement-breakpoint
ALTER TABLE `invoices` ADD `sourceSaleId` int;--> statement-breakpoint
ALTER TABLE `sale_items` ADD `baseUnitSnapshot` varchar(16);--> statement-breakpoint
ALTER TABLE `invoices` ADD CONSTRAINT `invoices_source_sale_unique` UNIQUE(`sourceSaleId`);