Initial commit: AuraK人才测评系统基础框架

## 已实现功能
- 题库管理后端API完整实现
- 模板管理页面(Settings-测评模板)
- 评估统计页面
- 人才测评页面(AssessmentView)
- QuestionBank前端服务层

## 技术栈
- 后端: Node.js + NestJS + TypeORM
- 前端: React + TypeScript
- 容器化: Docker Compose

## 已知待完善
- 题库列表页缺少删除按钮
- 题库详情页未实现(题目管理/AI生成/审核)

server/src/assessment/entities/question-bank.entity.ts

@@ -48,22 +48,21 @@ export class QuestionBank {
   description: string | null;
 
   @Column({
-    type: 'enum',
+    type: 'simple-enum',
     enum: QuestionBankStatus,
-    default: QuestionBankStatus.DRAFT,
   })
   status: QuestionBankStatus;
 
-  @Column({ name: 'created_by', nullable: true })
+  @Column({ name: 'created_by', nullable: true, type: 'text' })
   createdBy: string | null;
 
-  @Column({ name: 'reviewed_by', nullable: true })
+  @Column({ name: 'reviewed_by', nullable: true, type: 'text' })
   reviewedBy: string | null;
 
-  @Column({ name: 'reviewed_at', nullable: true })
+  @Column({ name: 'reviewed_at', nullable: true, type: 'datetime' })
   reviewedAt: Date | null;
 
-  @Column({ name: 'review_comment', nullable: true })
+  @Column({ name: 'review_comment', nullable: true, type: 'text' })
   reviewComment: string | null;
 
   @OneToMany(