允许 HHD 下采样率不同的标定保持兼容

按实际运行上下文核对其余处理参数，保留文件指纹与设备身份校验。115 项标定及运行时检查通过。

tests/test_calibration.py

@@ -306,6 +306,18 @@ def test_device_calibration_rejects_wrong_identity_and_pipeline(tmp_path: Path):
         load_for_device(root, "box", "BOX-001", pipeline={"dis_mode": 1})
 
 
+def test_device_calibration_accepts_only_downsample_difference(tmp_path: Path):
+    path = _device_file(tmp_path, "BOX-001")
+    doc = json.loads(path.read_text(encoding="utf-8"))
+    doc["pipeline"] = {"dis_mode": 1, "hhd_downsample": 3}
+    path.write_text(json.dumps(doc), encoding="utf-8")
+    assert load_for_device(
+        tmp_path, "box", "BOX-001", pipeline={"dis_mode": 1, "hhd_downsample": 2},
+    ) is not None
+    with pytest.raises(CalibrationError, match="dis_mode"):
+        load_for_device(tmp_path, "box", "BOX-001", pipeline={"dis_mode": 9, "hhd_downsample": 2})
+
+
 def test_device_calibration_rejects_partial_axes_and_unsafe_id(tmp_path: Path):
     root = tmp_path / "calibrations"
     root.mkdir()