chore: update .gitignore and enhance docstrings across multiple files

- Added *.pyc and *.pyo to .gitignore to prevent compiled Python files from being tracked.
- Improved docstrings in various modules, providing clearer descriptions of functions, parameters, and return values to enhance code readability and maintainability.

backend/app/api/v1/module_system/params/crud.py

@@ -12,10 +12,13 @@ class ParamsCRUD(CRUDBase[ParamsModel, ParamsCreateSchema, ParamsUpdateSchema]):
 
     def __init__(self, auth: AuthSchema) -> None:
         """
-        初始化配置CRUD
+        初始化系统参数配置数据层。
 
         参数:
-        - auth (AuthSchema): 认证信息模型
+        - auth (AuthSchema): 认证信息模型（含 DB 会话等上下文）。
+
+        返回:
+        - None
         """
         self.auth = auth
         super().__init__(model=ParamsModel, auth=auth)