Fix basedpyright type errors (#25435)

Signed-off-by: -LAN- <laipz8200@outlook.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/core/app/features/rate_limiting/__init__.py

@@ -1 +1,3 @@
 from .rate_limit import RateLimit
+
+__all__ = ["RateLimit"]

api/core/app/features/rate_limiting/rate_limit.py

@@ -19,7 +19,7 @@ class RateLimit:
     _ACTIVE_REQUESTS_COUNT_FLUSH_INTERVAL = 5 * 60  # recalculate request_count from request_detail every 5 minutes
     _instance_dict: dict[str, "RateLimit"] = {}
 
-    def __new__(cls: type["RateLimit"], client_id: str, max_active_requests: int):
+    def __new__(cls, client_id: str, max_active_requests: int):
         if client_id not in cls._instance_dict:
             instance = super().__new__(cls)
             cls._instance_dict[client_id] = instance