fix relations

api/src/entities/Merchant.ts

@@ -1,4 +1,5 @@
 import { Column, CreateDateColumn, Entity, ManyToOne, PrimaryGeneratedColumn, UpdateDateColumn } from 'typeorm';
+import type { Relation } from 'typeorm';
 import { User } from './User.js';
 
 @Entity('merchants')
@@ -25,5 +26,5 @@ export class Merchant {
   updatedAt!: Date;
 
   @ManyToOne(() => User, { onDelete: 'CASCADE' })
-  user!: User;
+  user!: Relation<User>;
 }