[Chore/Refactor] Switch from MyPy to Basedpyright for type checking (#25047)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/core/workflow/nodes/answer/answer_stream_processor.py

@@ -68,7 +68,7 @@ class AnswerStreamProcessor(StreamProcessor):
 
     def reset(self) -> None:
         self.route_position = {}
-        for answer_node_id, route_chunks in self.generate_routes.answer_generate_route.items():
+        for answer_node_id, _ in self.generate_routes.answer_generate_route.items():
             self.route_position[answer_node_id] = 0
         self.rest_node_ids = self.graph.node_ids.copy()
         self.current_stream_chunk_generating_node_ids = {}