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/app/app_config/entities.py

@@ -1,5 +1,5 @@
 from collections.abc import Sequence
-from enum import Enum, StrEnum
+from enum import StrEnum, auto
 from typing import Any, Literal, Optional
 
 from pydantic import BaseModel, Field, field_validator
@@ -61,14 +61,14 @@ class PromptTemplateEntity(BaseModel):
     Prompt Template Entity.
     """
 
-    class PromptType(Enum):
+    class PromptType(StrEnum):
         """
         Prompt Type.
         'simple', 'advanced'
         """
 
-        SIMPLE = "simple"
-        ADVANCED = "advanced"
+        SIMPLE = auto()
+        ADVANCED = auto()
 
         @classmethod
         def value_of(cls, value: str):
@@ -195,14 +195,14 @@ class DatasetRetrieveConfigEntity(BaseModel):
     Dataset Retrieve Config Entity.
     """
 
-    class RetrieveStrategy(Enum):
+    class RetrieveStrategy(StrEnum):
         """
         Dataset Retrieve Strategy.
         'single' or 'multiple'
         """
 
-        SINGLE = "single"
-        MULTIPLE = "multiple"
+        SINGLE = auto()
+        MULTIPLE = auto()
 
         @classmethod
         def value_of(cls, value: str):
@@ -293,12 +293,12 @@ class AppConfig(BaseModel):
     sensitive_word_avoidance: Optional[SensitiveWordAvoidanceEntity] = None
 
 
-class EasyUIBasedAppModelConfigFrom(Enum):
+class EasyUIBasedAppModelConfigFrom(StrEnum):
     """
     App Model Config From.
     """
 
-    ARGS = "args"
+    ARGS = auto()
     APP_LATEST_CONFIG = "app-latest-config"
     CONVERSATION_SPECIFIC_CONFIG = "conversation-specific-config"