feat: integrate invitation access, world NPCs, and deployment

src/business/invitation/invitation_code.entity.ts

@@ -0,0 +1,54 @@
+import { Column, CreateDateColumn, Entity, Index, PrimaryGeneratedColumn } from 'typeorm';
+
+@Entity('invitation_codes')
+export class InvitationCode {
+  @PrimaryGeneratedColumn({ type: 'bigint' })
+  id: bigint;
+
+  @Index({ unique: true })
+  @Column({ type: 'char', length: 64 })
+  code_hash: string;
+
+  @Column({ type: 'varchar', length: 20 })
+  code_prefix: string;
+
+  @Column({ type: 'int', unsigned: true, default: 1 })
+  max_uses: number;
+
+  @Column({ type: 'int', unsigned: true, default: 0 })
+  used_count: number;
+
+  @Column({ type: 'datetime', nullable: true })
+  expires_at?: Date | null;
+
+  @Column({ type: 'enum', enum: ['active', 'revoked'], default: 'active' })
+  status: 'active' | 'revoked';
+
+  @Column({ type: 'varchar', length: 255, nullable: true })
+  note?: string | null;
+
+  @Column({ type: 'bigint', nullable: true })
+  created_by?: bigint | null;
+
+  @CreateDateColumn({ type: 'datetime' })
+  created_at: Date;
+}
+
+@Entity('invitation_code_usages')
+@Index(['invitation_code_id', 'user_id'], { unique: true })
+export class InvitationCodeUsage {
+  @PrimaryGeneratedColumn({ type: 'bigint' })
+  id: bigint;
+
+  @Column({ type: 'bigint' })
+  invitation_code_id: bigint;
+
+  @Column({ type: 'bigint' })
+  user_id: bigint;
+
+  @Column({ type: 'varchar', length: 100 })
+  email: string;
+
+  @CreateDateColumn({ type: 'datetime' })
+  used_at: Date;
+}