This is a PR to keep them relatively small. Very likely changes, validations and other features will be added.
What:
Basic methods to cancel, confirm or decline order changes
Apply order changes to modify and create a new version of an order
Things related to calculation, Order and Item totals are not covered in this PR. Properties won't match with definition, etc.
Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>
**What**
> [!NOTE]
> I can see this pr becoming huge, so I d like to get this partial one merged 👍
- Fixes shared connection usage (mikro orm compare the instance to its own package and therefore was resulting in not trully reusing the provided connection leading to exhausting the connection pool as multiple connections was created and end up not being all destroyed properly under the hood, discovered in my integration tests)
- Create shipping options method implementation
- DTO's definition and service interface update
- integration tests
- Re work of the indexes with new util update
- Test runner utils to remove a big chunk of the boilerplate of the packages integrations
FIXES CORE-1742
