fix(aihr): bind SOP reviews to pilot identity

backend/script/sql/update/aihr_20260714_sop_requester_identity_mysql8.sql

@@ -0,0 +1,24 @@
+-- AIHR SOP 问答提问员工主体迁移（MySQL 8.x）
+-- 仅补齐结构，不写入业务数据；可重复执行。
+
+SET @aihr_sop_review_table_exists := (
+  SELECT COUNT(*)
+  FROM information_schema.TABLES
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'aihr_sop_answer_review'
+);
+SET @aihr_sop_requester_exists := (
+  SELECT COUNT(*)
+  FROM information_schema.COLUMNS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'aihr_sop_answer_review'
+    AND COLUMN_NAME = 'requester_ext_party_id'
+);
+SET @aihr_sop_requester_ddl := IF(
+  @aihr_sop_review_table_exists = 1 AND @aihr_sop_requester_exists = 0,
+  'ALTER TABLE aihr_sop_answer_review ADD COLUMN `requester_ext_party_id` varchar(100) DEFAULT NULL COMMENT ''提问员工外部主体ID'' AFTER `source`',
+  'SELECT 1'
+);
+PREPARE aihr_sop_requester_stmt FROM @aihr_sop_requester_ddl;
+EXECUTE aihr_sop_requester_stmt;
+DEALLOCATE PREPARE aihr_sop_requester_stmt;