refactor(api): rename dify_graph to graphon (#34095)

api/graphon/graph_events/base.py

@@ -0,0 +1,31 @@
+from pydantic import BaseModel, Field
+
+from graphon.enums import NodeType
+from graphon.node_events import NodeRunResult
+
+
+class GraphEngineEvent(BaseModel):
+    pass
+
+
+class BaseGraphEvent(GraphEngineEvent):
+    pass
+
+
+class GraphNodeEventBase(GraphEngineEvent):
+    id: str = Field(..., description="node execution id")
+    node_id: str
+    node_type: NodeType
+
+    in_iteration_id: str | None = None
+    """iteration id if node is in iteration"""
+    in_loop_id: str | None = None
+    """loop id if node is in loop"""
+
+    # The version of the node, or "1" if not specified.
+    node_version: str = "1"
+    node_run_result: NodeRunResult = Field(default_factory=NodeRunResult)
+
+
+class GraphAgentNodeEventBase(GraphNodeEventBase):
+    pass