Add order_id field to BA contracts
CHANGELOG:
### Added
- [#521](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/521) Add order_id field to BA contracts
Edited by Pelayo García
CHANGELOG:
### Added
- [#521](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/521) Add order_id field to BA contracts