feat: add department_id to all business entities

apps/server/src/entities/deposit.entity.ts

@@ -9,6 +9,7 @@ import {
 } from 'typeorm';
 import { Student } from './student.entity';
 import { DepositInstallment } from './deposit-installment.entity';
+import { Department } from './department.entity';
 
 @Entity('deposits')
 export class Deposit {
@@ -68,4 +69,10 @@ export class Deposit {
   @JoinColumn({ name: 'student_id' })
   student: Student;
 
+  @Column({ name: 'department_id', type: 'integer', nullable: true })
+  departmentId: number;
+
+  @ManyToOne(() => Department, { nullable: true })
+  @JoinColumn({ name: 'department_id' })
+  department: Department;
 }