feat: professionalize control plane and standalone delivery

docs/architecture.md

@@ -166,14 +166,18 @@ biliup-next/
 
 ```text
 created
-  -> ingested
+  -> running
   -> transcribed
+  -> running
   -> songs_detected
+  -> running
   -> split_done
+  -> running
   -> published
+  -> running
   -> commented
+  -> running
   -> collection_synced
-  -> completed
 ```
 
 失败状态不结束任务，而是转入：
@@ -194,5 +198,6 @@ created
 - 外部依赖不可直接在业务模块中调用 shell 或 HTTP
 - 配置统一由 `core.config` 读取
 - 管理端展示的数据优先来自数据库，不直接从日志推断
+- 工作区 flag 只表达交付副作用和产物标记，不作为 task 主状态事实源
 - 配置系统必须 schema-first
 - 插件系统必须 manifest-first