refactor: move mcp auth record ownership

src/wf_api/run_lifecycle.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 from datetime import UTC, datetime
 from uuid import uuid4
 
+from wf_api.saved_subgraphs import SavedSubgraphTree
 from wf_artifacts import (
     AvailableSource,
     CheckpointReason,
@@ -26,8 +27,6 @@ from wf_core import (
     load_run_state,
 )
 
-from wf_api.saved_subgraphs import SavedSubgraphTree
-
 
 def create_pinned_environment(
     *,