make sure resources are set up in isolated namespaces

app.py

@@ -8,17 +8,19 @@ from src.infra.stack import QCStack
 app = cdk.App()
 
 config_path = app.node.try_get_context("config") or "config.yaml"
-stack_name = app.node.try_get_context("stack_name") or "MLOpsStack"
 account_id = app.node.try_get_context("account_id") or os.getenv("CDK_DEFAULT_ACCOUNT")
 delete_bucket_data = str(app.node.try_get_context("delete_bucket_data") or "false").lower() == "true"
 
 cfg = load_config(config_path)
+stack_name = app.node.try_get_context("stack_name") or cfg.infra.stack_name
+bootstrap_qualifier = app.node.try_get_context("bootstrap_qualifier") or cfg.infra.effective_bootstrap_qualifier
 
 QCStack(
     app,
     stack_name,
     config=cfg,
     delete_bucket_data=delete_bucket_data,
+    synthesizer=cdk.DefaultStackSynthesizer(qualifier=bootstrap_qualifier),
     env=cdk.Environment(
         account=account_id,
         region=cfg.aws.region,