Add password login, set-password, business images migration, and user serialization.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/entities/user.entity.ts

@@ -32,6 +32,9 @@ export class UserEntity {
   @Column({ default: true })
   isActive!: boolean;
 
+  @Column({ type: 'varchar', nullable: true, length: 255, select: false })
+  passwordHash!: string | null;
+
   @OneToMany(() => BusinessEntity, (business) => business.owner)
   ownedBusinesses!: BusinessEntity[];