feat(system):优化后端

1.新增后端测试
2.增加了后端的加密
3.增加了i18n（国际化）

tests/unit/test_utils_ray_hook.py

@@ -0,0 +1,46 @@
+"""``ray_hook`` 中纯逻辑容器与 actor 句柄缓存的行为。"""
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from kilostar.utils.ray_hook import ActorList
+
+
+def test_actor_list_attribute_set_get_delete():
+    actors = ActorList()
+    actors.foo = "bar"
+    assert actors.foo == "bar"
+    del actors.foo
+    with pytest.raises(AttributeError):
+        _ = actors.foo
+
+
+def test_actor_list_missing_raises_attribute_error():
+    actors = ActorList()
+    with pytest.raises(AttributeError):
+        _ = actors.not_exist
+
+
+def test_actor_list_delete_missing_raises_attribute_error():
+    actors = ActorList()
+    with pytest.raises(AttributeError):
+        del actors.not_exist
+
+
+def test_ray_actor_hook_uses_fake_registry(fake_actors):
+    """``ray_actor_hook`` 通过 fake registry 取 actor 并组装成 ActorList。"""
+    handle = MagicMock()
+    fake_actors.register("postgres_database", handle)
+
+    from kilostar.utils.ray_hook import ray_actor_hook
+
+    actors = ray_actor_hook("postgres_database")
+    assert actors.postgres_database is handle
+
+
+def test_ray_actor_hook_unknown_actor_raises(fake_actors):
+    from kilostar.utils.ray_hook import ray_actor_hook
+
+    with pytest.raises(ValueError):
+        ray_actor_hook("does_not_exist")