Product cost price avco sync for mrp

This module extends the existing cost price synchronisation feature so that it also works for manufacturing. When the cost of a raw material changes, Odoo recalculates the cost of the finished product that was produced with it.

• It works on stock valuation layers, the records Odoo uses to store the value of stock movements.
• When a valuation layer comes from consuming a raw material in a production order, the module looks at the finished products of that same production order and updates their unit cost and total value.
• The new cost is built from the consumed materials, the cost of work centres based on recorded working time, and any extra cost defined on the production order.
• Only finished products using the average cost method are updated.
• When a valuation layer comes from a production order itself, its unit cost is taken from the consumed materials instead of being handled by the standard synchronisation logic.

There are no new menus or screens: the change happens automatically in the background when stock valuation is processed. It touches stock.valuation.layer and relies on manufacturing data such as production orders, work orders and their time records.