chore: bump minimum supported Python version to 3.11 (#10386)

api/core/rag/datasource/keyword/keyword_type.py

@@ -1,5 +1,5 @@
-from enum import Enum
+from enum import StrEnum
 
 
-class KeyWordType(str, Enum):
+class KeyWordType(StrEnum):
     JIEBA = "jieba"

api/core/rag/datasource/vdb/vector_type.py

@@ -1,7 +1,7 @@
-from enum import Enum
+from enum import StrEnum
 
 
-class VectorType(str, Enum):
+class VectorType(StrEnum):
     ANALYTICDB = "analyticdb"
     CHROMA = "chroma"
     MILVUS = "milvus"