feat: 添加复查功能和批量审核操作

- 复查功能: PUT /assessment/:id/review
  * 支持调整最终总分
  * 记录复查历史(reviewHistory)
  * 保存原始分数(originalScore)
  * 保留复查人、复查时间、复查意见

- 批量审核: POST /question-banks/:bankId/items/batch-review
  * 支持批量通过/拒绝题目
  * 可添加审核意见

- AssessmentSession实体: 添加复查相关字段

server/src/assessment/assessment.controller.ts

@@ -158,4 +158,21 @@ export class AssessmentController {
       knowledgeGroupId,
     );
   }
+
+  @Put(':id/review')
+  @ApiOperation({ summary: 'Review assessment - adjust final score' })
+  async review(
+    @Param('id') sessionId: string,
+    @Body() body: { newScore: number; comment?: string },
+    @Req() req: any,
+  ) {
+    const { id: userId, tenantId } = req.user;
+    return this.assessmentService.reviewAssessment(
+      sessionId,
+      body.newScore,
+      body.comment,
+      userId,
+      tenantId,
+    );
+  }
 }