[FIX] l10n_it_edi: import fattura pa expected singleton product error

Sometimes when importing products that share the same internal reference code (default_code) the _import_fattura_pa function will throw an expected singleton error. This is because, in order to find the product for the line of the invoice, it will search for the product reference code (e.g. [CONS_0001]), which is not necessarily unique.

I've set the limit to one on the search to fix the immediate error for
now, but I will add more logic to better search for the relevant product
in a future commit.

closes odoo/odoo#84826

Task-id: 2764978
X-original-commit: aae609915cb1f76c32c518ff8959674853633f55
Signed-off-by: Josse Colpaert <jco@odoo.com>

addons/l10n_it_edi/models/account_edi_format.py

@@ -482,7 +482,7 @@ class AccountEdiFormat(models.Model):
                                 if not invoice_line_form.product_id:
                                     for element_code in elements_code:
                                         code = element_code.xpath('.//CodiceValore')[0]
-                                        product = self.env['product.product'].search([('default_code', '=', code.text)])
+                                        product = self.env['product.product'].search([('default_code', '=', code.text)], limit=1)
                                         if product:
                                             invoice_line_form.product_id = product
                                             break

addons/l10n_it_edi_sdicoop/models/account_edi_format.py

@@ -3,7 +3,7 @@
 
 from odoo import models, _, _lt
 from odoo.exceptions import UserError
-from odoo.addons.account_edi_proxy_client.models.account_edi_proxy_user import AccountEdiProxyError, DEFAULT_SERVER_URL, DEFAULT_TEST_SERVER_URL
+from odoo.addons.account_edi_proxy_client.models.account_edi_proxy_user import AccountEdiProxyError
 
 from lxml import etree
 import base64