refactor: make subscription lifecycle events durable

tests/test_host_runtime_context.py

@@ -17,7 +17,7 @@ from app.api.data import (
     get_api_data_ports,
 )
 from app.startup import lifecycle
-from app.startup.context import AgentChatRuntime, HostRuntime
+from app.startup.context import AgentChatRuntime, HostRuntime, SubscriptionRuntime
 
 
 class _Repository:
@@ -42,6 +42,20 @@ class _UnitOfWork:
         """模拟回滚。"""
 
 
+class _Outbox:
+    """记录绑定会话的异步 outbox 替身。"""
+
+    def __init__(self, session: object) -> None:
+        """保存与订阅仓储相同的请求会话。"""
+        self.session = session
+
+    async def stage(self, intent, now) -> None:
+        """模拟暂存 durable intent。"""
+
+    async def complete_by_event_key(self, event_key, completed_at) -> None:
+        """模拟收口 durable intent。"""
+
+
 def _runtime() -> HostRuntime:
     """构造不加载数据库引擎或 PluginManager 的假宿主运行时。"""
     async def async_session():
@@ -66,6 +80,13 @@ def _runtime() -> HostRuntime:
             repository=_Repository,
             transaction=_UnitOfWork,
         ),
+        subscription=SubscriptionRuntime(
+            async_session=async_session,
+            repository=_Repository,
+            history_repository=_Repository,
+            transaction=_UnitOfWork,
+            outbox=_Outbox,
+        ),
         compatibility_api_data=compatibility,
     )