fix delete conversations via Api and delete conversations from db as well (#23591)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: crazywoola <427733928@qq.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

api/services/conversation_service.py

@@ -1,4 +1,5 @@
 import contextlib
+import logging
 from collections.abc import Callable, Sequence
 from typing import Any, Optional, Union
 
@@ -23,6 +24,9 @@ from services.errors.conversation import (
     LastConversationNotExistsError,
 )
 from services.errors.message import MessageNotExistsError
+from tasks.delete_conversation_task import delete_conversation_related_data
+
+logger = logging.getLogger(__name__)
 
 
 class ConversationService:
@@ -175,11 +179,21 @@ class ConversationService:
 
     @classmethod
     def delete(cls, app_model: App, conversation_id: str, user: Optional[Union[Account, EndUser]]):
-        conversation = cls.get_conversation(app_model, conversation_id, user)
+        try:
+            logger.info(
+                "Initiating conversation deletion for app_name %s, conversation_id: %s",
+                app_model.name,
+                conversation_id,
+            )
 
-        conversation.is_deleted = True
-        conversation.updated_at = naive_utc_now()
-        db.session.commit()
+            db.session.query(Conversation).where(Conversation.id == conversation_id).delete(synchronize_session=False)
+            db.session.commit()
+
+            delete_conversation_related_data.delay(conversation_id)
+
+        except Exception as e:
+            db.session.rollback()
+            raise e
 
     @classmethod
     def get_conversational_variable(