hotfix(brightpearl): wrap inventory update in transaction (#184)

packages/medusa-plugin-brightpearl/src/services/brightpearl.js

@@ -5,6 +5,7 @@ import Brightpearl from "../utils/brightpearl"
 class BrightpearlService extends BaseService {
   constructor(
     {
+      manager,
       oauthService,
       totalsService,
       productVariantService,
@@ -18,6 +19,7 @@ class BrightpearlService extends BaseService {
   ) {
     super()
 
+    this.manager_ = manager
     this.options = options
     this.productVariantService_ = productVariantService
     this.regionService_ = regionService
@@ -189,8 +191,12 @@ class BrightpearlService extends BaseService {
         .retrieveBySKU(sku)
         .catch((_) => undefined)
       if (variant && variant.manage_inventory) {
-        await this.productVariantService_.update(variant.id, {
-          inventory_quantity: onHand,
+        await this.manager_.transaction((m) => {
+          return this.productVariantService_
+            .withTransaction(m)
+            .update(variant.id, {
+              inventory_quantity: onHand,
+            })
         })
       }
     }