feat(aihr): persist interview results and candidate material review

面试记录落 aihr_interview_result(GET /records 查询),候选人补充资料
走 OSS + aihr_candidate_material,管理端 AI 面试页可审核通过/驳回;
案例整理服务增强;两张新表纳入 reset 脚本。

backend/script/sql/aihr_interview_result_mysql8.sql

@@ -0,0 +1,26 @@
+-- AI 面试结果最小持久化表：finish 后保存评分结果、回答快照和维度分。
+-- ponytail: one result table covers MVP history and dashboard count; split question/answer tables when audit workflows need it.
+
+CREATE TABLE IF NOT EXISTS `aihr_interview_result` (
+  `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
+  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `session_id` varchar(100) NOT NULL COMMENT '面试会话ID',
+  `candidate_id` varchar(80) DEFAULT NULL COMMENT '候选人ID',
+  `candidate_name` varchar(100) DEFAULT NULL COMMENT '候选人姓名',
+  `position_code` varchar(120) DEFAULT NULL COMMENT '岗位',
+  `total_score` int DEFAULT NULL COMMENT '总分',
+  `result` varchar(40) DEFAULT NULL COMMENT '结论',
+  `suggestion` varchar(500) DEFAULT NULL COMMENT '建议',
+  `ai_summary` varchar(1000) DEFAULT NULL COMMENT 'AI摘要',
+  `evidence` varchar(1000) DEFAULT NULL COMMENT '评分依据',
+  `source` varchar(40) DEFAULT NULL COMMENT '评分来源',
+  `answers_json` text DEFAULT NULL COMMENT '候选人回答JSON',
+  `dimensions_json` text DEFAULT NULL COMMENT '维度评分JSON',
+  `finished_time` datetime DEFAULT NULL COMMENT '完成时间',
+  `create_time` datetime DEFAULT NULL COMMENT '创建时间',
+  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `uk_aihr_interview_session` (`tenant_id`, `session_id`),
+  KEY `idx_aihr_interview_candidate` (`tenant_id`, `candidate_id`, `finished_time`),
+  KEY `idx_aihr_interview_finished` (`tenant_id`, `finished_time`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='AI HR 面试结果';