feat(file-summary): 接入文件汇总工作流触发

review_agent/file_summary/events.py

@@ -0,0 +1,16 @@
+from __future__ import annotations
+
+from review_agent.models import FileSummaryBatch, WorkflowEvent
+
+
+def record_event(batch: FileSummaryBatch, event_type: str, payload: dict | None = None) -> WorkflowEvent:
+    return WorkflowEvent.objects.create(batch=batch, event_type=event_type, payload=payload or {})
+
+
+def serialize_event(event: WorkflowEvent) -> dict[str, object]:
+    return {
+        "id": event.pk,
+        "event_type": event.event_type,
+        "payload": event.payload,
+        "created_at": event.created_at.isoformat(),
+    }