feat: add inspection task lifecycle controls

drizzle/0012_inspection_task_created_status.sql

@@ -0,0 +1,11 @@
+-- 检测任务新增 created 初始状态；task_analysis_results.status 仍保留原有语义
+
+ALTER TABLE `inspection_tasks`
+  MODIFY COLUMN `status` ENUM('created','pending','processing','completed','error') NOT NULL DEFAULT 'created';
+
+UPDATE `inspection_tasks` AS t
+LEFT JOIN `task_analysis_results` AS r
+  ON r.`taskId` = t.`id`
+SET t.`status` = 'created'
+WHERE t.`status` = 'pending'
+  AND r.`id` IS NULL;