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/rag/datasource/keyword/jieba/jieba.py

@@ -1,5 +1,5 @@
 from collections import defaultdict
-from typing import Any, Optional
+from typing import Any
 
 import orjson
 from pydantic import BaseModel
@@ -143,7 +143,7 @@ class Jieba(BaseKeyword):
                 storage.delete(file_key)
             storage.save(file_key, dumps_with_sets(keyword_table_dict).encode("utf-8"))
 
-    def _get_dataset_keyword_table(self) -> Optional[dict]:
+    def _get_dataset_keyword_table(self) -> dict | None:
         dataset_keyword_table = self.dataset.dataset_keyword_table
         if dataset_keyword_table:
             keyword_table_dict = dataset_keyword_table.keyword_table_dict

api/core/rag/datasource/keyword/jieba/jieba_keyword_table_handler.py

@@ -1,5 +1,5 @@
 import re
-from typing import Optional, cast
+from typing import cast
 
 
 class JiebaKeywordTableHandler:
@@ -10,7 +10,7 @@ class JiebaKeywordTableHandler:
 
         jieba.analyse.default_tfidf.stop_words = STOPWORDS  # type: ignore
 
-    def extract_keywords(self, text: str, max_keywords_per_chunk: Optional[int] = 10) -> set[str]:
+    def extract_keywords(self, text: str, max_keywords_per_chunk: int | None = 10) -> set[str]:
         """Extract keywords with JIEBA tfidf."""
         import jieba.analyse  # type: ignore