Updates one or more adjustment records for the given cartId.

Mandatory Fields (each adjustment):

• Id - required to identify the record to update
• LineItemId - links the adjustment to a specific line item
• AdjustmentType and AdjustmentAmount - both required together when applying an adjustment

Required Fields:

• cartId (route) - required
• adjustmentLineItems (body) - must not be null or empty

Behavior

• The body must be a non-empty array; an empty or null list returns 400 Bad Request.
• Duplicate records with the same Id are removed before processing (last wins).
• Updated adjustments trigger asynchronous re-pricing (202 Accepted while processing).
• Access to the product configuration is enforced by the configuration access filter (403 Forbidden when not permitted).