fix(core-flows, types, medusa): fix batch delete types in workflows and routes (#8974)

- Fix the returned data of batch delete steps / workflows for deleted records to just be the array of IDs.
- Add a new type `BatchResponse` for API routes to have a different shape for deleted records
- Update batch delete helpers to return the expected shape for API routes

packages/core/core-flows/src/fulfillment/steps/delete-shipping-option-rules.ts

@@ -33,7 +33,7 @@ export const deleteShippingOptionRulesStep = createStep(
 
     await fulfillmentModule.deleteShippingOptionRules(ids)
 
-    return new StepResponse(null, shippingOptionRules)
+    return new StepResponse(ids, shippingOptionRules)
   },
   async (shippingOptionRules, { container }) => {
     if (!shippingOptionRules?.length) {

packages/core/core-flows/src/product/workflows/batch-product-variants.ts

@@ -54,11 +54,7 @@ export const batchProductVariantsWorkflow = createWorkflow(
       return {
         created: data.res[0],
         updated: data.res[1],
-        deleted: {
-          ids: data.input.delete ?? [],
-          object: "product_variant",
-          deleted: true,
-        },
+        deleted: data.input.delete ?? [],
       }
     })
 

packages/core/core-flows/src/product/workflows/batch-products.ts

@@ -47,11 +47,7 @@ export const batchProductsWorkflow = createWorkflow(
         return {
           created: data.res[0],
           updated: data.res[1],
-          deleted: {
-            ids: data.input.delete ?? [],
-            object: "product",
-            deleted: true,
-          },
+          deleted: data.input.delete ?? [],
         }
       })
     )

packages/core/core-flows/src/promotion/steps/delete-promotion-rules-workflow.ts

@@ -22,11 +22,7 @@ export const deletePromotionRulesWorkflowStep = createStep(
     }
 
     return new StepResponse(
-      {
-        ids: data.data.rule_ids ?? [],
-        object: "promotion-rule",
-        deleted: true,
-      },
+      data.data.rule_ids ?? [],
       transaction
     )
   },