chore: import upstream snapshot with attribution

tools/test_apps/system/psram_stack/pytest_psram_stack.py

@@ -0,0 +1,20 @@
+# SPDX-FileCopyrightText: 2026 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+import pytest
+from pytest_embedded import Dut
+from pytest_embedded_idf.utils import idf_parametrize
+from pytest_embedded_idf.utils import soc_filtered_targets
+
+
+@pytest.mark.generic
+@pytest.mark.parametrize(
+    'config',
+    [
+        'default',
+        'light_sleep',
+    ],
+    indirect=True,
+)
+@idf_parametrize('target', soc_filtered_targets('SOC_SPIRAM_SUPPORTED == 1'), indirect=['target'])
+def test_psram_stack(dut: Dut) -> None:
+    dut.run_all_single_board_cases()