**What**
Fix system error (500) with DraftOrder create operation when payload includes discount in a tax-inclusive context.
**How**
* Ensure newly created cart contains all required relation in order to calculate line item tax-inclusive pricing with discounts.
* Add resilience to TotalsService.getLineDiscounts()
* Ensure newly generate line items have variant relation loaded.
* fix TotalsService.getLineItemTotals to use the passed lineItem instead of relying on cartOrOrder.items.
**Test**
* Unit:
* TotalsService.getLineDiscounts - coverage
* Integration:
* Admin API draft-order - coverage
* Admin API draft-order create w/ discount in tax-inclusive
Resolves: CORE-771
Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>
Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>
* adds bulk add/remove products to/from collection. Adds endpoint updateProducts on collections that uses these bulk operations
* fix integration tests and test description
* undo change to swap
* made requested changes
* added removeProducts endpoint
* made requested changes
* fix: set collection_id null
* updated collection_id to type string | undefined
* added default relations to retrieve collection endpoint
* push snapshot
* added created at and updated at to collection list endpoint
* updated integration tests
* added q param to list collections
* updated snapshots
