Add accumulator retake workflow restore

tools/prompt_smoke.py

@@ -8004,7 +8004,13 @@ def smoke_server_route_payload_policy() -> None:
 
     key = "smoke_route_payload"
     loop_nodes._ACCUMULATOR_STORES[key] = [
-        {"id": "first", "value": "alpha", "_sxcp_preview_key": "first-key"},
+        {
+            "id": "first",
+            "value": "alpha",
+            "_sxcp_preview_key": "first-key",
+            "prompt": {"api": "prompt"},
+            "extra_pnginfo": {"workflow": {"nodes": [{"id": 1, "type": "SmokeNode"}]}},
+        },
         {"id": "second", "value": "beta", "_sxcp_preview_key": "second-key"},
     ]
     try:
@@ -8012,6 +8018,13 @@ def smoke_server_route_payload_policy() -> None:
         _expect(listed.get("count") == 2, "Accumulator list payload lost stored entries")
         _expect(listed["entries"][0].get("value") == "alpha", "Accumulator list payload lost value summary")
 
+        retake = server_routes.accumulator_retake_payload({"store_key": key, "preview_key": "first-key"})
+        _expect(
+            retake.get("workflow", {}).get("nodes", [{}])[0].get("type") == "SmokeNode",
+            "Accumulator retake payload lost workflow metadata",
+        )
+        _expect(retake.get("prompt", {}).get("api") == "prompt", "Accumulator retake payload lost prompt metadata")
+
         moved = server_routes.accumulator_move_payload({"store_key": key, "entry_id": "second", "target_index": "1"})
         _expect(moved.get("moved") is True, "Accumulator move payload did not report movement")
         _expect(moved.get("from_index") == 2 and moved.get("to_index") == 1, "Accumulator move payload changed indices")