chore(spec): 归档 add-blog-launch——Phase 4 六任务收敛

spec_verify --all 六项同指纹 exit=0；check 收敛；真实 push E2E 见合并后

Spec: 2026-10-25_add-blog-launch

Co-authored-by: GLM-5.3

.spec/specs/2026-10-25_add-blog-launch/tasks.md

@@ -32,7 +32,7 @@
   - boundary: infra/deploy/launch.sh（root 执行）：备份 vhost→wait4x.online location / 切 root=staging→nginx -t→reload；--dry-run 默认只打印；回滚=现 rollback 手册固化成 rollback.sh；docs/上线检查单.md（含 ESA 刷新步骤）
   - verify: `bash infra/deploy/launch.sh --dry-run`
 
-- [ ] T6 验收归档
+- [x] T6 验收归档
   - depends-on: task_0003, task_0004, task_0005
   - claim: orchestrator
   - boundary: 全 verify 复跑 + 板房汇报 + 归档提交