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

lib/distribution-release-service.ts

@@ -4,7 +4,6 @@ import { refreshTaskStatus } from "./task-service";
 type ReleasableDistribution = {
   id: string;
   task_id: string;
-  task_type: string;
   content_id: string;
   content_title: string;
   partner_id: string;
@@ -28,7 +27,6 @@ export class DistributionReleaseError extends Error {
 export function distributionReleaseBlockReason(input: {
   publishUrl?: string | null;
   resultSubmittedAt?: string | null;
-  taskType?: string | null;
 }) {
   if (input.publishUrl) return "已回填发布链接的笔记不能释放";
   if (input.resultSubmittedAt) return "已提交结果截图的任务不能释放";
@@ -49,7 +47,6 @@ export async function releaseUnfinishedDistribution(
         `SELECT
           d.id,
           d.task_id,
-          t.task_type,
           d.content_id,
           c.title AS content_title,
           d.partner_id,
@@ -74,7 +71,6 @@ export async function releaseUnfinishedDistribution(
     const blocked = distributionReleaseBlockReason({
       publishUrl: distribution.publish_url,
       resultSubmittedAt: distribution.result_submitted_at,
-      taskType: distribution.task_type,
     });
     if (blocked) throw new DistributionReleaseError(blocked, 409);