feat: ability to publish and draft inventory adjustment transactions.

server/src/models/InventoryAdjustment.js

@@ -20,7 +20,7 @@ export default class InventoryAdjustment extends TenantModel {
    * Virtual attributes.
    */
   static get virtualAttributes() {
-    return ['inventoryDirection'];
+    return ['inventoryDirection', 'isPublished'];
   }
 
   /**
@@ -30,6 +30,14 @@ export default class InventoryAdjustment extends TenantModel {
     return InventoryAdjustment.getInventoryDirection(this.type);
   }
 
+  /**
+   * Detarmines whether the adjustment is published.
+   * @return {boolean}
+   */
+  get isPublished() {
+    return !!this.publishedAt;
+  }
+
   static getInventoryDirection(type) {
     const directions = {
       'increment': 'IN',