add load_dotenv to tests

tests/conftest.py

@@ -8,6 +8,7 @@ from typing import TYPE_CHECKING, AsyncGenerator
 
 import orjson
 import pytest
+from dotenv import load_dotenv
 from fastapi.testclient import TestClient
 from httpx import AsyncClient
 from langflow.graph.graph.base import Graph
@@ -27,6 +28,9 @@ if TYPE_CHECKING:
     from langflow.services.database.service import DatabaseService
 
 
+load_dotenv()
+
+
 def pytest_configure(config):
     config.addinivalue_line("markers", "noclient: don't create a client for this test")
     data_path = Path(__file__).parent.absolute() / "data"