회기 연속성과 멀티 케이스 계약을 영속화

apps/api/app/test_session_memory.py

@@ -693,6 +693,12 @@ class SessionMemoryPersistenceTest(unittest.IsolatedAsyncioTestCase):
                 self.executed.append((query, args))
                 return "OK"
 
+            async def fetchval(self, query: str, *args: object) -> object:
+                self.executed.append((query, args))
+                test_case.assertIn("FROM app.case_profile", query)
+                test_case.assertIn("FOR NO KEY UPDATE", query)
+                return args[0]
+
             async def fetchrow(self, query: str, *args: object):
                 self.executed.append((query, args))
                 if "INSERT INTO app.pinned_fact" in query:
@@ -773,6 +779,17 @@ class SessionMemoryPersistenceTest(unittest.IsolatedAsyncioTestCase):
             persisted = await session_persistence.end_session(sess, carry)
 
         self.assertTrue(persisted)
+        case_lock_index = next(
+            index
+            for index, (query, _) in enumerate(conn.executed)
+            if "SELECT case_id" in query and "FOR NO KEY UPDATE" in query
+        )
+        session_end_index = next(
+            index
+            for index, (query, _) in enumerate(conn.executed)
+            if "UPDATE app.sessions" in query and "ended_at" in query
+        )
+        self.assertLess(case_lock_index, session_end_index)
         summary_writes = [
             args for query, args in conn.executed if "INSERT INTO app.session_summary" in query
         ]