feat: add log for export api

app/core/logging_config.py

@@ -2,11 +2,15 @@
 
 import logging
 import logging.handlers
+from contextvars import ContextVar
 from pathlib import Path
 from typing import Any
 
 from app.core.config import get_settings
 
+# Context variable to hold the current request_id across async boundaries
+request_id_ctx: ContextVar[str] = ContextVar("request_id", default="-")
+
 
 class TimedRotatingAndSizeFileHandler(logging.handlers.TimedRotatingFileHandler):
     """File handler that rotates by both time (daily) and size (100MB)."""
@@ -92,14 +96,13 @@ def setup_logging(log_dir: str | None = None) -> logging.Logger:
     # Remove existing handlers to avoid duplicates
     logger.handlers.clear()
 
-    # Create custom formatter that handles missing request_id
+    # Create custom formatter that automatically injects request_id from context
     class RequestIDFormatter(logging.Formatter):
-        """Formatter that handles request_id in log records."""
+        """Formatter that injects request_id from ContextVar into log records."""
 
         def format(self, record):
-            # Add request_id if not present
             if not hasattr(record, "request_id"):
-                record.request_id = getattr(record, "request_id", "unknown")
+                record.request_id = request_id_ctx.get()
             return super().format(record)
 
     formatter = RequestIDFormatter(