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_database_exception.py

@@ -0,0 +1,72 @@
+"""``database_exception`` 装饰器：透传异常并通过 logger 上报。"""
+
+import pytest
+from pydantic import BaseModel, ValidationError
+from sqlalchemy.exc import IntegrityError, OperationalError
+
+from kilostar.core.postgres_database.database_exception import database_exception
+from kilostar.utils.error import UserNotExistError
+
+
+async def test_normal_path_returns_value():
+    @database_exception
+    async def ok() -> int:
+        return 42
+
+    assert await ok() == 42
+
+
+async def test_passes_args_and_kwargs():
+    @database_exception
+    async def add(a, b, *, c) -> int:
+        return a + b + c
+
+    assert await add(1, 2, c=3) == 6
+
+
+async def test_validation_error_propagates():
+    class Model(BaseModel):
+        x: int
+
+    @database_exception
+    async def boom() -> None:
+        Model(x="not-int")  # type: ignore[arg-type]
+
+    with pytest.raises(ValidationError):
+        await boom()
+
+
+async def test_integrity_error_propagates():
+    @database_exception
+    async def boom() -> None:
+        raise IntegrityError("stmt", {}, Exception("dup"))
+
+    with pytest.raises(IntegrityError):
+        await boom()
+
+
+async def test_operational_error_propagates():
+    @database_exception
+    async def boom() -> None:
+        raise OperationalError("stmt", {}, Exception("conn"))
+
+    with pytest.raises(OperationalError):
+        await boom()
+
+
+async def test_user_not_exist_error_propagates():
+    @database_exception
+    async def boom() -> None:
+        raise UserNotExistError("missing")
+
+    with pytest.raises(UserNotExistError):
+        await boom()
+
+
+async def test_unexpected_error_propagates():
+    @database_exception
+    async def boom() -> None:
+        raise RuntimeError("unexpected")
+
+    with pytest.raises(RuntimeError):
+        await boom()