refactor: move workflow package to dify_graph (#32844)

api/dify_graph/graph_events/agent.py

@@ -0,0 +1,17 @@
+from collections.abc import Mapping
+from typing import Any
+
+from pydantic import Field
+
+from .base import GraphAgentNodeEventBase
+
+
+class NodeRunAgentLogEvent(GraphAgentNodeEventBase):
+    message_id: str = Field(..., description="message id")
+    label: str = Field(..., description="label")
+    node_execution_id: str = Field(..., description="node execution id")
+    parent_id: str | None = Field(..., description="parent id")
+    error: str | None = Field(..., description="error")
+    status: str = Field(..., description="status")
+    data: Mapping[str, Any] = Field(..., description="data")
+    metadata: Mapping[str, object] = Field(default_factory=dict)