feat: add Student-User association and activate all notification TODOs

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

@@ -5,6 +5,7 @@ import {
   CreateDateColumn,
   UpdateDateColumn,
   ManyToOne,
+  OneToOne,
   JoinColumn,
   OneToMany,
 } from 'typeorm';
@@ -12,6 +13,7 @@ import { Occupancy } from './occupancy.entity';
 import { PersonalExpense } from './personal-expense.entity';
 import { Bill } from './bill.entity';
 import { Tenant } from './tenant.entity';
+import { User } from './user.entity';
 
 @Entity('students')
 export class Student {
@@ -59,6 +61,13 @@ export class Student {
   @OneToMany(() => Occupancy, (o) => o.student)
   occupancies: Occupancy[];
 
+  @Column({ name: 'user_id', type: 'integer', nullable: true, unique: true })
+  userId: number;
+
+  @OneToOne(() => User, { nullable: true })
+  @JoinColumn({ name: 'user_id' })
+  user: User;
+
   @Column({ name: 'tenant_id', type: 'integer', nullable: true })
   tenantId: number;