feat: inventory adjustment service.

server/src/models/InventoryAdjustment.js

@@ -0,0 +1,29 @@
+import { Model } from 'objection';
+import TenantModel from 'models/TenantModel';
+
+export default class InventoryAdjustment extends TenantModel {
+  /**
+   * Table name
+   */
+  static get tableName() {
+    return 'inventory_adjustments';
+  }
+
+  /**
+   * Relationship mapping.
+   */
+  static get relationMappings() {
+    const Account = require('models/InventoryAdjustmentEntry');
+    
+    return {
+      entries: {
+        relation: Model.BelongsToOneRelation,
+        modelClass: Account.default,
+        join: {
+          from: 'inventory_adjustments.id',
+          to: 'inventory_adjustments_entries.adjustmentId',
+        },
+      },
+    };
+  }
+}

server/src/models/InventoryAdjustmentEntry.js

@@ -0,0 +1,29 @@
+import { Model } from 'objection';
+import TenantModel from 'models/TenantModel';
+
+export default class InventoryAdjustmentEntry extends TenantModel {
+  /**
+   * Table name
+   */
+  static get tableName() {
+    return 'inventory_adjustments_entries';
+  }
+
+  /**
+   * Relationship mapping.
+   */
+  static get relationMappings() {
+    const Account = require('models/InventoryAdjustment');
+    
+    return {
+      entries: {
+        relation: Model.BelongsToOneRelation,
+        modelClass: Account.default,
+        join: {
+          from: 'inventory_adjustments_entries.adjustmentId',
+          to: 'inventory_adjustments.id',
+        },
+      },
+    };
+  }
+}