第一次提交

backend/migrations/create_workflow_versions_table.sql

@@ -0,0 +1,18 @@
+-- 创建工作流版本表
+CREATE TABLE IF NOT EXISTS workflow_versions (
+    id CHAR(36) PRIMARY KEY COMMENT '版本ID',
+    workflow_id CHAR(36) NOT NULL COMMENT '工作流ID',
+    version INT NOT NULL COMMENT '版本号',
+    name VARCHAR(100) NOT NULL COMMENT '工作流名称',
+    description TEXT COMMENT '描述',
+    nodes JSON NOT NULL COMMENT '节点配置',
+    edges JSON NOT NULL COMMENT '边配置',
+    status VARCHAR(20) DEFAULT 'draft' COMMENT '状态: draft/published/running/stopped',
+    created_by CHAR(36) COMMENT '创建者ID',
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+    comment TEXT COMMENT '版本备注',
+    FOREIGN KEY (workflow_id) REFERENCES workflows(id) ON DELETE CASCADE,
+    FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL,
+    INDEX idx_workflow_id (workflow_id),
+    INDEX idx_version (workflow_id, version)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='工作流版本表';