Add dataset bench and validation agents

backend/tests/test_dataset_service.py

@@ -0,0 +1,13 @@
+from app.modules.dataset.service import create_dataset, describe_dataset
+
+
+def test_create_dataset_layout(tmp_path, monkeypatch):
+    from types import SimpleNamespace
+    from app.modules.dataset import service
+
+    monkeypatch.setattr(service, "settings", SimpleNamespace(project_root=tmp_path))
+    created = create_dataset("case 01", "demo")
+    assert created["name"] == "case_01"
+    assert created["counts"] == {"images": 0, "labels": 0, "masks": 0}
+    described = describe_dataset("case_01")
+    assert described["layout"]["images"].endswith("images")