test: pin the expiry window and close settlement review gaps

tests/unit/test_deadline.py

@@ -5,6 +5,7 @@
 """
 
 import asyncio
+import time
 
 import pytest
 
@@ -124,14 +125,23 @@ async def test_narrow_success_returns_value_without_pending_cancellation():
 
 
 async def test_domain_error_inside_window_propagates():
+    """计时器已触发但取消尚未投递的窗口内,体内先抛领域异常 → 原样上抛,期限静默让位。
+
+    忙等超过期限: 计时器回调已在 loop 上触发,但任务不挂起取消就投递不进来,
+    此刻体内同步抛出的领域异常必须原样逃逸(设计 §5.2 形态四)。
+    """
+
     class BoomError(RuntimeError):
         pass
 
     async def body():
+        end = time.monotonic() + 0.1
+        while time.monotonic() < end:
+            pass
         raise BoomError("boom")
 
     with pytest.raises(BoomError):
-        await with_call_deadline(body(), deadline_s=0.05, scope="llm")
+        await with_call_deadline(body(), deadline_s=0.02, scope="llm")
 
 
 async def test_none_deadline_takes_the_legacy_path():