ruff check fix

src/wf_core/runtime/__init__.py

@@ -21,6 +21,7 @@ from .subgraphs import PreparedSubgraph
 __all__ = [
     "AsyncNodeHandler",
     "NodeHandler",
+    "PreparedSubgraph",
     "WorkflowExecutionError",
     "coerce_node_result",
     "complete_step",
@@ -34,5 +35,4 @@ __all__ = [
     "resume_workflow_result_async",
     "step_workflow",
     "step_workflow_async",
-    "PreparedSubgraph",
 ]

src/wf_core/runtime/scheduler.py

@@ -15,7 +15,7 @@ class BlockedOnChildren:
     child_frame_ids: tuple[str, ...]
 
     @classmethod
-    def from_frame(cls, frame: ExecutionFrame) -> "BlockedOnChildren | None":
+    def from_frame(cls, frame: ExecutionFrame) -> BlockedOnChildren | None:
         raw = frame.metadata.get("blocked_on")
         if raw is None:
             return None
@@ -46,7 +46,7 @@ class ForeachIterationMetadata:
     loop_alias: str
 
     @classmethod
-    def from_frame(cls, frame: ExecutionFrame) -> "ForeachIterationMetadata | None":
+    def from_frame(cls, frame: ExecutionFrame) -> ForeachIterationMetadata | None:
         if frame.kind != "foreach_iteration":
             return None
         metadata = frame.metadata