feat: wire feishu notifications into workflows

tests/test_file_summary_workflow.py

@@ -71,6 +71,31 @@ def test_start_file_summary_workflow_runs_synchronously_for_tests(django_user_mo
     assert WorkflowEvent.objects.filter(batch=batch, event_type="workflow_completed").exists()
 
 
+def test_file_summary_workflow_dispatches_completion_notification(monkeypatch, django_user_model):
+    user = django_user_model.objects.create_user(username="owner", password="pass")
+    conversation = Conversation.objects.create(user=user, title="会话")
+    FileAttachment.objects.create(
+        conversation=conversation,
+        user=user,
+        original_name="a.docx",
+        storage_path="x/a.docx",
+        file_size=1,
+    )
+    batch = create_file_summary_batch(conversation=conversation, user=user)
+    calls = []
+
+    def fake_dispatch(context):
+        calls.append(context)
+
+    monkeypatch.setattr("review_agent.file_summary.workflow.dispatch_workflow_notification", fake_dispatch)
+
+    start_file_summary_workflow(batch, async_run=False)
+
+    assert calls
+    assert calls[-1].workflow_type == "file_summary"
+    assert calls[-1].workflow_batch_id == batch.pk
+
+
 def test_workflow_extracts_archive_and_scans_extracted_files(settings, tmp_path, django_user_model):
     settings.MEDIA_ROOT = tmp_path
     user = django_user_model.objects.create_user(username="owner", password="pass")