Stock Orderpoint Replenishment demand origin details

When Odoo runs a replenishment (for example from the Inventory Replenishment view or a reordering rule), it normally creates a purchase order whose Origin only mentions the rule that triggered it. This module looks at the Forecast report for the product and warehouse, finds the outgoing documents that created the demand (such as sales orders), and rewrites the purchase order's Origin to show those document names followed by the original origin.

• The purchase order line gets a new field, source_group_ids, labelled "Procurements from Forecast Report", which stores the procurement groups behind the demand.
• The purchase order's smart button for sale orders is extended so it also shows the sales orders linked through those procurement groups, letting users jump straight to them.
• The change happens automatically during procurement execution; no manual action is needed.
• If no source document is found, the origin is left unchanged.

The module touches procurement.group, purchase.order and purchase.order.line. It depends on purchase_stock and sale_stock, so it works in the standard purchase and sales flows. It does not add new menus or screens; the information appears on existing purchase order forms.