fix(safety): 修复 __init__.py 末尾换行和 test_filter_is_registered CI 失败

Author: Stelquis

tests/tools/safety/test_filter.py

@@ -35,6 +35,8 @@ class TestSafetyFilter:
 
     def test_filter_is_registered(self):
         """SafetyFilter should be registered with the TOOL filter type."""
+        # 确保模块导入触发 @register_tool_filter 装饰器
+        from trpc_agent_sdk.tools.safety import _safety_filter  # noqa: F401
         from trpc_agent_sdk.filter import get_tool_filter
         filter_instance = get_tool_filter("safety_filter")
         assert filter_instance is not None

trpc_agent_sdk/tools/safety/__init__.py

@@ -53,4 +53,4 @@
     "SafetyWrapper",
     "ScanInput",
     "ScriptType",
-]
+]