feat: 任务模型物理合并，发布+回收并为单任务双阶段

- tasks 新增 recovery_enabled/recovery_due_at/recovery_instructions/recovery_example_images，回收挂自己名下（先发布后交截图），不再置 complete
- 存量 screenshot_collect 迁移并入父任务后删除（mysql/0020 含 DELETE，生产执行前务必备份）
- 新 action task_enable_recovery：ghost 面板一键开通回收，截止默认=发布截止
- 企微催办双阶段（待发布/截图待提交）；超期自动释放仅发布阶段
- admin 删 groupTaskMasters 聚合改单卡双面板；portal 详情页回收截图区块+批次回收进度
- 测试 309 全绿 + Playwright E2E 20/20

tests/wecom-notifier.test.mjs

@@ -62,7 +62,7 @@ test("runDueSoonWecomNotifications filters by taskId when given", async () => {
   );
   assert.equal(executed.length, 1);
   assert.match(executed[0].sql, /AND t\.id = \?/);
-  assert.deepEqual(executed[0].values, ["2026-08-21", "task-9"]);
+  assert.deepEqual(executed[0].values, ["2026-08-21", "2026-08-21", "task-9"]);
   assert.equal(summary.dueSoonAttempted, 0);
   assert.equal(summary.digestSent, false);
 });
@@ -73,5 +73,5 @@ test("runDueSoonWecomNotifications keeps global scan without taskId", async () =
   await runDueSoonWecomNotifications(db, NOTIFY_CONFIG, undefined, now);
   assert.equal(executed.length, 1);
   assert.ok(!/AND t\.id = \?/.test(executed[0].sql));
-  assert.deepEqual(executed[0].values, ["2026-08-21"]);
+  assert.deepEqual(executed[0].values, ["2026-08-21", "2026-08-21"]);
 });