Add a Batch Code or Source Field to Track the Supplier of Each License Key

Allow us to add a batch code or supplier name when adding or importing license keys, so they can identify where each key was purchased, even months later. The batch code should be visible in the License Keys list, included in the Export CSV, and ideally shown on the Orders page next to the delivered key. This will help us to trace invalid keys back to the correct supplier and request replacements or refunds without affecting the existing tag-to-product assignment.