feat: make model age admission-only

tests/test_gpu_strategy.py

@@ -133,6 +133,34 @@ class GPUStrategyTests(unittest.TestCase):
             self.assertEqual(200, manager.state["acceptedTotal"])
             self.assertEqual(0, manager.state["acceptedSinceRefresh"])
 
+    def test_refresh_prefers_classified_attributable_outcomes(self) -> None:
+        with tempfile.TemporaryDirectory() as temporary_dir:
+            path = Path(temporary_dir) / "strategy.json"
+            raw_history = make_history(
+                "gpu-a",
+                0,
+                200,
+                start=datetime(2026, 1, 1, tzinfo=timezone.utc),
+            )
+            classified_history = make_history(
+                "gpu-b",
+                200,
+                0,
+                start=datetime(2026, 1, 1, tzinfo=timezone.utc),
+            )
+            client = HistoryClient(raw_history)
+            manager = GPUStrategyManager(path, long_term_min_samples=100)
+
+            state = manager.prepare(
+                client,
+                supported_gpus=["gpu-a", "gpu-b", "gpu-c"],
+                history_records=classified_history,
+            )
+
+            self.assertEqual(0, client.list_calls)
+            self.assertEqual("classified_attributable_outcomes", state["historySource"])
+            self.assertEqual("gpu-b", state["longTermGpus"][0])
+
     def test_market_weights_change_gpu_mix_without_changing_70_30_split(self) -> None:
         supported = ["gpu-a", "gpu-b", "gpu-c", "gpu-d"]
         manager = GPUStrategyManager("unused.json", market_intelligence=WeightedMarket())