feat(sql): 安保工单扩展表新增 false_alarm 字段，附增量迁移脚本

- DDL: ops_order_security_ext 新增 false_alarm tinyint(1) 列
- 增量迁移: ops_order_security_ext_migrate.sql 供已部署环境 ALTER TABLE

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sql/mysql/ops_order_security_ext_migrate.sql

@@ -0,0 +1,9 @@
+-- ----------------------------
+-- Incremental migration for ops_order_security_ext
+-- Version: v1.1.0 (2026-03-15)
+-- Description: Add false_alarm column for false alarm marking
+-- ----------------------------
+
+ALTER TABLE `ops_order_security_ext`
+    ADD COLUMN `false_alarm` tinyint(1) DEFAULT NULL COMMENT '是否误报: 1=误报'
+    AFTER `result_img_urls`;