test(pool): 修复测试用例中硬编码历史日期导致租约过期判定的问题

tests/test_account_lease_reaper.py

@@ -19,7 +19,7 @@ from web.backend.models import (
 from web.backend.services import account_pool as pool
 from web.backend.services.automation.jobs import account_lease_reaper as reaper
 
-NOW = datetime(2026, 10, 7, 12, 0, 0, tzinfo=UTC)
+NOW = datetime.now(UTC).replace(microsecond=0)
 
 
 class _ReaperBase:

tests/test_account_pool.py

@@ -19,7 +19,7 @@ from tests.support.db import get_test_engine, make_test_session
 from web.backend.models import Account, AccountEvent, AccountLease, DouyuTask, User
 from web.backend.services import account_pool as pool
 
-NOW = datetime(2026, 10, 7, 10, 0, 0, tzinfo=UTC)
+NOW = datetime.now(UTC).replace(microsecond=0)
 COMMODITY = "20260120QYOOB_bag10"