Add VariableService and related files

src/backend/base/langflow/graph/vertex/base.py

@@ -4,20 +4,14 @@ import inspect
 import types
 from enum import Enum
 from typing import TYPE_CHECKING, Any, AsyncIterator, Callable, Dict, Iterator, List, Optional
-
 from loguru import logger
 
-from langflow.graph.schema import (
+from langflow.graph.schema import INPUT_COMPONENTS, OUTPUT_COMPONENTS, InterfaceComponentTypes, ResultData
-    INPUT_COMPONENTS,
-    INPUT_FIELD_NAME,
-    OUTPUT_COMPONENTS,
-    InterfaceComponentTypes,
-    ResultData,
-)
 from langflow.graph.utils import UnbuiltObject, UnbuiltResult
 from langflow.graph.vertex.utils import generate_result
 from langflow.interface.initialize import loading
 from langflow.interface.listing import lazy_load_dict
+from langflow.schema.schema import INPUT_FIELD_NAME
 from langflow.services.deps import get_storage_service
 from langflow.utils.constants import DIRECT_TYPES
 from langflow.utils.schemas import ChatOutputResponse

src/backend/base/langflow/services/deps.py

@@ -8,7 +8,6 @@ if TYPE_CHECKING:
 
     from langflow.services.cache.service import CacheService
     from langflow.services.chat.service import ChatService
-    from langflow.services.credentials.service import VariableService
     from langflow.services.database.service import DatabaseService
     from langflow.services.monitor.service import MonitorService
     from langflow.services.plugins.service import PluginService
@@ -18,6 +17,7 @@ if TYPE_CHECKING:
     from langflow.services.storage.service import StorageService
     from langflow.services.store.service import StoreService
     from langflow.services.task.service import TaskService
+    from langflow.services.variable.service import VariableService
 
 
 def get_socket_service() -> "SocketIOService":

src/backend/base/langflow/services/variable/factory.py

@@ -1,7 +1,7 @@
 from typing import TYPE_CHECKING
 
-from langflow.services.credentials.service import VariableService
 from langflow.services.factory import ServiceFactory
+from langflow.services.variable.service import VariableService
 
 if TYPE_CHECKING:
     from langflow.services.settings.service import SettingsService