Account Portal Invoice Search By Lot

This module extends the invoice and bill search available in the Odoo customer portal. When a customer types a search term in the "Invoices & Bills" portal page, Odoo now also checks whether that term matches the lot or serial number of a product delivered on a sales order linked to the invoice.

• The search is an exact match on the lot or serial number, not a partial or fuzzy search. This is intentional to keep the portal fast even with very large databases.
• Only lots or serial numbers from completed stock moves are considered, so draft or cancelled deliveries are ignored.
• The module adds a technical search field on account.move and extends the portal search domain, so the new behaviour is integrated into the existing portal search rather than adding a separate screen or button.
• It relies on the account_portal_invoice_search module for the portal search feature and on sale_stock to link invoices to sales orders and stock lots.

No new menus, reports, emails or scheduled actions are added. The change is limited to how the portal invoice search behaves for users who know the lot or serial number of a product.