fix: Remove unused Union import and add type hinting for get_cache_se…

…rvice

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

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from contextlib import asynccontextmanager
-from typing import TYPE_CHECKING, Union
+from typing import TYPE_CHECKING
 
 from langflow.services.schema import ServiceType
 
@@ -23,11 +23,11 @@
 # These imports MUST be outside TYPE_CHECKING because FastAPI uses eval_str=True
 # to evaluate type annotations, and these types are used as return types for
 # dependency functions that FastAPI evaluates at module load time.
-from lfx.services.settings.service import SettingsService
+from lfx.services.settings.service import SettingsService  # noqa: TC002
 
-from langflow.services.job_queue.service import JobQueueService
-from langflow.services.storage.service import StorageService
-from langflow.services.telemetry.service import TelemetryService
+from langflow.services.job_queue.service import JobQueueService  # noqa: TC001
+from langflow.services.storage.service import StorageService  # noqa: TC001
+from langflow.services.telemetry.service import TelemetryService  # noqa: TC001
 
 
 def get_service(service_type: ServiceType, default=None):
@@ -176,7 +176,7 @@ async def session_scope() -> AsyncGenerator[AsyncSession, None]:
         yield session
 
 
-def get_cache_service() -> Union[CacheService, AsyncBaseCacheService]:
+def get_cache_service() -> CacheService | AsyncBaseCacheService:
     """Retrieves the cache service from the service manager.
 
     Returns: