修复风控时间口径与Agent截断提示

tests/contract/test_risk_agent_contract.py

@@ -439,3 +439,10 @@ async def test_general_list_question_uses_complete_search_summary() -> None:
     assert "CUST-002" in text
     assert "稳健一号" in text
     assert "全部命中记录" in text
+
+
+def test_agent_prompt_requires_truncation_disclosure() -> None:
+    prompt = public_risk_agent._agent_system_prompt("查看当前预警")
+
+    assert "data_truncated=true" in prompt
+    assert "证据不完整" in prompt