Fix cache test seeds

tests/unit/test_graph_scheduler.py

@@ -53,7 +53,7 @@ def test_request_hash_stable():
 def test_mock_renderer_caches_identical_requests():
     r = MockVideoRenderer()
     a1 = r.generate({"prompt": "same", "num_frames": 48, "seed": 7})
-    a2 = r.generate({"prompt": "same", "seed": 1, "num_frames": 48})  # same canonical dict
+    a2 = r.generate({"seed": 7, "prompt": "same", "num_frames": 48})  # same canonical dict
     assert a1["request_hash"] == a2["request_hash"]
     assert a1["cached"] is False and a2["cached"] is True