fix/various fixes

api/app/core/logging.py

@@ -28,7 +28,11 @@ class InterceptHandler(logging.Handler):
 
 
 def setup_logging() -> None:
-    """Call once at application startup, before any other import that logs."""
+    """Call once at process entry (API：`main`；Worker：`celery_app` 在首行调用)。
+
+    Celery 需在 `app.tasks.celery_app` 中设置 `worker_hijack_root_logger=False`，否则
+    会覆盖根 logger，无法与下方 InterceptHandler + loguru 格式对齐。
+    """
     logger.remove()
 
     logger.add(
@@ -36,7 +40,7 @@ def setup_logging() -> None:
         level="INFO",
         format=(
             "<green>{time:YYYY-MM-DD HH:mm:ss.SSS}</green> | "
-            "<level>{level: <8}</level> | "
+            "<level>{level.name: <8}</level> | "
             "<cyan>{name}</cyan>:<cyan>{function}</cyan>:<cyan>{line}</cyan> | "
             "{extra[request_id]} | "
             "<level>{message}</level>"