add migration and entities for uploads upload_zk upload_hotlink.

backend/src/modules/upload/entities/Upload.ts

@@ -0,0 +1,43 @@
+import { Column, CreateDateColumn, Entity, OneToOne, PrimaryGeneratedColumn } from 'typeorm';
+import { UploadMode } from '../types/UploadMode';
+import { UploadHotlink } from './UploadHotlink';
+import { UploadZk } from './UploadZk';
+
+@Entity('uploads')
+export class Upload {
+    @PrimaryGeneratedColumn('uuid')
+    id: string;
+
+    @Column({ type: 'enum', enum: UploadMode })
+    mode: UploadMode;
+
+    @Column({ type: 'text' })
+    storagePath: string;
+
+    @Column({ type: 'bytea' })
+    iv: Buffer;
+
+    @Column({ type: 'int', nullable: true })
+    maxViews: number | null;
+
+    @Column({ type: 'int', default: 0 })
+    viewCount: number;
+
+    @Column()
+    deleteTokenHash: string;
+
+    @OneToOne(() => UploadZk, zk => zk.upload)
+    zk: UploadZk | null;
+
+    @OneToOne(() => UploadHotlink, hotlink => hotlink.upload)
+    hotlink: UploadHotlink | null;
+
+    @Column({ type: 'timestamptz', nullable: true })
+    lastViewedAt: Date | null;
+
+    @Column({ type: 'timestamptz', nullable: true })
+    expiresAt: Date | null;
+
+    @CreateDateColumn({ type: 'timestamptz' })
+    createdAt: Date;
+}