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_logger/__init__.py

@@ -0,0 +1,43 @@
+"""日志模块 —— 通道由调用栈自动推断。"""
+
+from __future__ import annotations
+
+import logging
+import sys
+
+
+def _infer_channel() -> str:
+    """根据调用栈自动推断日志通道。"""
+    frame = sys._getframe(2)
+    filename = frame.f_code.co_filename
+    if "/controllers/" in filename:
+        return "CONTROLLER"
+    if "/services/" in filename:
+        return "SERVICE"
+    if "/models/" in filename:
+        return "MODEL"
+    if "/leaudit_bridge/" in filename:
+        return "BRIDGE"
+    if "/handler/" in filename:
+        return "HANDLER"
+    if "/tasks/" in filename:
+        return "TASK"
+    if "/middleware/" in filename:
+        return "MIDDLEWARE"
+    if "postgrest" in filename:
+        return "POSTGREST"
+    if "uvicorn" in filename:
+        return "UVICORN"
+    return "APP"
+
+
+class _ChannelLogger:
+    """代理 logger，自动推断通道。"""
+
+    def __getattr__(self, name: str):
+        channel = _infer_channel()
+        logger = logging.getLogger(channel)
+        return getattr(logger, name)
+
+
+logger: object = _ChannelLogger()  # type: ignore[assignment]