chore: add ast-grep rule to convert Optional[T] to T | None (#25560)

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

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

@@ -1,5 +1,5 @@
 from collections.abc import Mapping, Sequence
-from typing import Any, Optional, cast
+from typing import Any, cast
 
 from core.variables import ArrayFileSegment, FileSegment
 from core.workflow.entities.node_entities import NodeRunResult
@@ -25,7 +25,7 @@ class AnswerNode(BaseNode):
     def init_node_data(self, data: Mapping[str, Any]):
         self._node_data = AnswerNodeData.model_validate(data)
 
-    def _get_error_strategy(self) -> Optional[ErrorStrategy]:
+    def _get_error_strategy(self) -> ErrorStrategy | None:
         return self._node_data.error_strategy
 
     def _get_retry_config(self) -> RetryConfig:
@@ -34,7 +34,7 @@ class AnswerNode(BaseNode):
     def _get_title(self) -> str:
         return self._node_data.title
 
-    def _get_description(self) -> Optional[str]:
+    def _get_description(self) -> str | None:
         return self._node_data.desc
 
     def _get_default_value_dict(self) -> dict[str, Any]:

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

@@ -1,7 +1,6 @@
 import logging
 from abc import ABC, abstractmethod
 from collections.abc import Generator
-from typing import Optional
 
 from core.workflow.entities.variable_pool import VariablePool
 from core.workflow.graph_engine.entities.event import GraphEngineEvent, NodeRunExceptionEvent, NodeRunSucceededEvent
@@ -72,7 +71,7 @@ class StreamProcessor(ABC):
             for node_id in unreachable_first_node_ids:
                 self._remove_node_ids_in_unreachable_branch(node_id, reachable_node_ids)
 
-    def _fetch_node_ids_in_reachable_branch(self, node_id: str, branch_identify: Optional[str] = None) -> list[str]:
+    def _fetch_node_ids_in_reachable_branch(self, node_id: str, branch_identify: str | None = None) -> list[str]:
         if node_id not in self.rest_node_ids:
             self.rest_node_ids.append(node_id)
         node_ids = []