[RL][Cherry-Pick] Fix the out-of-bounds issue caused by int32 in the R3 kernel (#7155)

* [RL]Perf: Optimize batch delete prefix and fused put in R3 (#6604)

* Optimizate delete batch and fused put

* refine code

* refine code

* refine code

* Support suspend r3

* [RL] Fix R3 Empty bug with TP=1 (#6777)

* Fix int32 overflow

* refine code

---------

Co-authored-by: YuBaoku <49938469+EmmonsCurse@users.noreply.github.com>

fastdeploy/config.py

@@ -1764,6 +1764,9 @@ class RouterConfig:
         else:
             self.metrics_port = self.api_server_port
 
+    def __str__(self):
+        return json.dumps({key: value for key, value in self.__dict__.items()})
+
 
 class CommitConfig:
     """
@@ -1877,6 +1880,9 @@ class RoutingReplayConfig:
         """
         return json.dumps({key: value for key, value in self.__dict__.items()})
 
+    def __str__(self):
+        return self.to_json_string()
+
 
 class FDConfig:
     """