fix model load/unload

tests/test_dynamic_routing.py

@@ -375,6 +375,11 @@ def test_admin_can_replace_a_served_model_and_release_it():
         with urllib.request.urlopen(load) as response:
             assert json.loads(response.read())["assignment"]["node_id"] == node["node_id"]
         heartbeat = _post_json(f"http://127.0.0.1:{port}/v1/nodes/{node['node_id']}/heartbeat", {})
+        _post_json(
+            f"http://127.0.0.1:{port}/v1/nodes/{node['node_id']}/heartbeat",
+            {"completed_directives": [{"action": "DROP_SHARD", "model": "Qwen/Qwen2.5-0.5B-Instruct"}]},
+        )
+        network = _get_json(f"http://127.0.0.1:{port}/v1/network/map")
         assert heartbeat["directives"][0]["action"] == "LOAD_SHARD"
         release = urllib.request.Request(
             f"http://127.0.0.1:{port}/v1/models/release",
@@ -386,6 +391,33 @@ def test_admin_can_replace_a_served_model_and_release_it():
         tracker.stop()
 
     assert heartbeat["directives"][0]["action"] == "DROP_SHARD"
+    released_node = next(item for item in network["nodes"] if item["node_id"] == node["node_id"])
+    assert released_node["shard_start"] is None
+    assert released_node["shard_end"] is None
+
+
+def test_models_list_does_not_duplicate_a_preset_registered_by_hf_repo():
+    """A preset and its canonical repository are one selectable model."""
+    tracker = TrackerServer(enable_billing=False)
+    port = tracker.start()
+    try:
+        _post_json(
+            f"http://127.0.0.1:{port}/v1/nodes/register",
+            {
+                "endpoint": "http://127.0.0.1:9913",
+                "model": "Qwen2.5-0.5B-Instruct",
+                "hf_repo": "Qwen/Qwen2.5-0.5B-Instruct",
+                "num_layers": 24,
+                "shard_start": 0,
+                "shard_end": 23,
+            },
+        )
+        models = _get_json(f"http://127.0.0.1:{port}/v1/models")["data"]
+    finally:
+        tracker.stop()
+
+    assert [model["id"] for model in models].count("qwen2.5-0.5b-instruct") == 1
+    assert not any(model["id"] == "Qwen/Qwen2.5-0.5B-Instruct" for model in models)
 
 
 def test_endpoint_key_distinguishes_same_port_different_hosts():