Create and validate a landed cost entry in Odoo (stock.landed.cost) via XML-RPC to allocate freight charges across received inventory lines

Steps

1. Connect via XML-RPC to /xmlrpc/2/object; authenticate using the common endpoint /xmlrpc/2/common to get the uid.
2. Create the landed cost record: models.execute_kw(db, uid, pwd, 'stock.landed.cost', 'create', [{'picking_ids': [(4, pickingId)], 'vendor_bill_id': billId}]) — picking_ids uses the many2many add tuple (4, id).
3. Add cost lines via the cost_lines field using a one2many create tuple: pass [{'product_id': freightProductId, 'price_unit': 150.0, 'split_method': 'by_weight'}] in the create call or via write with (0, 0, vals).
4. Valid split_method values are: 'equal', 'by_quantity', 'by_current_cost_price', 'by_weight', 'by_volume' — choose the one matching your allocation rule.
5. Validate the landed cost: call execute_kw on 'stock.landed.cost' method 'button_validate' with [lcId] — this posts the accounting entries and adjusts the inventory valuation.
6. Verify the valuation adjustment layers via 'stock.valuation.adjustment.lines' model: search_read with domain [['cost_id','=',lcId]] to confirm per-move allocation amounts.