电子签基础功能

database/migrations/20260904_qiyuesuo_reinitiate.sql

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+-- 增加入职电子签“作废后重新发起”能力。
+-- 已执行 20260903_qiyuesuo_electronic_sign.sql 的数据库需要单独执行本文件。
+
+SET NAMES utf8mb4;
+
+ALTER TABLE `ob_electronic_sign_process`
+    ADD COLUMN `IsCurrent` TINYINT(1) NULL DEFAULT NULL
+        COMMENT '是否为任务当前电子签流程，历史流程为空'
+        AFTER `BizId`;
+
+ALTER TABLE `ob_electronic_sign_process`
+    ADD COLUMN `ReissueReason` VARCHAR(500) NULL
+        COMMENT '重新发起原因'
+        AFTER `RetryCount`,
+    ADD COLUMN `ReissuedAt` DATETIME(3) NULL
+        COMMENT '被新流程替代时间'
+        AFTER `ReissueReason`,
+    ADD COLUMN `ReissuedByProcessId` BIGINT NULL
+        COMMENT '替代当前流程的新流程Id'
+        AFTER `ReissuedAt`;
+
+-- 雪花 Id 与创建时间同序，每个任务只把最新一条流程标记为当前流程。
+UPDATE `ob_electronic_sign_process` process
+INNER JOIN (
+    SELECT `TaskId`, MAX(`Id`) AS `LatestProcessId`
+    FROM `ob_electronic_sign_process`
+    GROUP BY `TaskId`
+) latest ON latest.`LatestProcessId` = process.`Id`
+SET process.`IsCurrent` = 1;
+
+ALTER TABLE `ob_electronic_sign_process`
+    ADD UNIQUE KEY `uk_ob_esign_process_current` (`TaskId`, `IsCurrent`);
+