chore: init monorepo snapshot

services/rag_gateway/app/core/logging.py

@@ -0,0 +1,27 @@
+import json
+import logging
+import sys
+from typing import Any, Dict
+
+
+class JsonFormatter(logging.Formatter):
+    """统一 JSON 日志，方便跨服务链路排查"""
+
+    def format(self, record: logging.LogRecord) -> str:  # type: ignore[override]
+        log: Dict[str, Any] = {
+            "ts": self.formatTime(record, datefmt="%Y-%m-%dT%H:%M:%S%z"),
+            "level": record.levelname,
+            "logger": record.name,
+            "message": record.getMessage(),
+        }
+        if record.exc_info:
+            log["exc_info"] = self.formatException(record.exc_info)
+        for key, value in getattr(record, "extra", {}).items():
+            log[key] = value
+        return json.dumps(log, ensure_ascii=False)
+
+
+def setup_logging(level: str = "INFO") -> None:
+    handler = logging.StreamHandler(sys.stdout)
+    handler.setFormatter(JsonFormatter())
+    logging.basicConfig(handlers=[handler], level=level, force=True)