feat: applicant Entity 생성

apps/api/src/entity/applicant.entity.ts

@@ -0,0 +1,30 @@
+import {
+  Entity,
+  Index,
+  Column,
+  PrimaryGeneratedColumn,
+  ManyToOne,
+  JoinColumn,
+  CreateDateColumn,
+} from 'typeorm';
+
+import { Ticle } from './ticle.entity';
+import { User } from './user.entity';
+
+@Entity('applicant')
+@Index('idx_unique_application', ['ticle_id', 'user_id'], { unique: true })
+export class Applicant {
+  @PrimaryGeneratedColumn({ type: 'bigint' })
+  id: number;
+
+  @ManyToOne(() => Ticle, (ticle) => ticle.id)
+  @JoinColumn({ name: 'ticle_id' })
+  ticle: Ticle;
+
+  @ManyToOne(() => User, (user) => user.ticles)
+  @JoinColumn({ name: 'user_id' })
+  user: User;
+
+  @CreateDateColumn({ type: 'timestamp', default: () => 'CURRENT_TIMESTAMP', name: 'created_at' })
+  createdAt: Date;
+}