test: mark bedrock integ tests as serial to avoid concurrent import job quota issues

X-AI-Prompt: add serial marker to bedrock integ tests
X-AI-Tool: kiro-cli

Author: lucasjia-aws

sagemaker-serve/tests/integ/test_bedrock_provisioned_throughput.py

@@ -119,6 +119,7 @@ def _setup_model_files(s3_artifacts_uri, s3_client):
             logger.warning("Could not create added_tokens.json: %s", e)
 
 
+@pytest.mark.serial
 class TestBedrockImportJobPolling:
     """Test import job polling for OSS models (Option C: deploy only waits for import)."""
 
@@ -184,6 +185,7 @@ def test_deploy_oss_model_waits_for_import_completion(
         assert imported_model_name in model_names
 
 
+@pytest.mark.serial
 class TestBedrockProvisionedThroughput:
     """Test create_provisioned_throughput as a standalone method.
 

sagemaker-serve/tests/integ/test_model_customization_deployment.py

@@ -307,6 +307,7 @@ def test_dpo_trainer_build(self, training_job_name, sagemaker_session):
 from sagemaker.serve.bedrock_model_builder import BedrockModelBuilder
 
 
+@pytest.mark.serial
 class TestModelCustomizationDeployment:
     """Test suite for deploying fine-tuned models to Bedrock."""