chore: adopt StrEnum and auto() for some string-typed enums (#25129)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>

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

@@ -1,13 +1,13 @@
-from enum import Enum
+from enum import StrEnum, auto
 
 
-class Field(Enum):
+class Field(StrEnum):
     CONTENT_KEY = "page_content"
     METADATA_KEY = "metadata"
     GROUP_KEY = "group_id"
-    VECTOR = "vector"
+    VECTOR = auto()
     # Sparse Vector aims to support full text search
-    SPARSE_VECTOR = "sparse_vector"
+    SPARSE_VECTOR = auto()
     TEXT_KEY = "text"
     PRIMARY_KEY = "id"
     DOC_ID = "metadata.doc_id"

api/core/rag/datasource/vdb/myscale/myscale_vector.py

@@ -1,7 +1,7 @@
 import json
 import logging
 import uuid
-from enum import Enum
+from enum import StrEnum
 from typing import Any
 
 from clickhouse_connect import get_client
@@ -27,7 +27,7 @@ class MyScaleConfig(BaseModel):
     fts_params: str
 
 
-class SortOrder(Enum):
+class SortOrder(StrEnum):
     ASC = "ASC"
     DESC = "DESC"