fix: preserve Arr metadata and fail closed

fileflows/tests/test_flow_import_failure_routing.py

@@ -0,0 +1,31 @@
+import json
+import unittest
+from pathlib import Path
+
+
+FLOW = Path(__file__).parents[1] / "flow" / "flow_auto_movie_pipeline.json"
+
+
+class FlowImportFailureRoutingTests(unittest.TestCase):
+    def test_arr_import_failures_route_to_fail_flow(self):
+        flow = json.loads(FLOW.read_text())
+        fail_node = next(
+            part
+            for part in flow["Parts"]
+            if part.get("FlowElementUid") == "FileFlows.BasicNodes.Functions.FailFlow"
+        )
+        import_nodes = [
+            part
+            for part in flow["Parts"]
+            if part.get("Name")
+            in {"Sonarr - Trigger Manual Import", "Radarr - Trigger Manual Import"}
+        ]
+
+        self.assertEqual(len(import_nodes), 4)
+        for node in import_nodes:
+            with self.subTest(node=node["Uid"]):
+                self.assertEqual(node["ErrorConnection"]["InputNode"], fail_node["Uid"])
+
+
+if __name__ == "__main__":
+    unittest.main()