fix: poetry lock file, bedrock test client

adalflow/tests/test_aws_bedrock_client.py

@@ -1,7 +1,9 @@
+import os
 import unittest
 from unittest.mock import Mock, patch
 from adalflow.core.types import ModelType, GeneratorOutput
 from adalflow.components.model_client import BedrockAPIClient
+from adalflow import setup_env
 
 
 class TestBedrockClient(unittest.TestCase):