chore: 初始化项目与后端基础工程

backend/app/core/logging.py

@@ -0,0 +1,17 @@
+import logging
+
+import structlog
+
+
+def configure_logging(log_level: str = "INFO") -> None:
+    level = getattr(logging, log_level.upper(), logging.INFO)
+
+    structlog.configure(
+        processors=[
+            structlog.processors.TimeStamper(fmt="iso"),
+            structlog.processors.add_log_level,
+            structlog.processors.JSONRenderer(ensure_ascii=False),
+        ],
+        wrapper_class=structlog.make_filtering_bound_logger(level),
+        cache_logger_on_first_use=True,
+    )