chore: initial commit — leaudit-platform project skeleton

17-table PostgreSQL schema with full Chinese column comments,
FastAPI project structure (admin/common/modules),
DSL rule files, and schema migration scripts.

fastapi_common/fastapi_common_web/controller.py

@@ -0,0 +1,20 @@
+"""BaseController —— 所有控制器继承此类。"""
+
+from __future__ import annotations
+
+from fastapi import APIRouter
+
+
+class BaseController:
+    """控制器基类。
+
+    子类在 __init__ 中用 @self.router.get/post 注册路由。
+    """
+
+    def __init__(self, prefix: str = "", tags: list[str] | None = None):
+        self.router = APIRouter(prefix=prefix, tags=tags or [])
+        self.Init()
+
+    def Init(self) -> None:
+        """子类重写此方法注册路由。"""
+        pass