Add session utils helper usage centralization guard

Co-authored-by: Shri Sukhani <shrisukhani@users.noreply.github.com>

Author: cursoragent

CONTRIBUTING.md

@@ -226,6 +226,7 @@ This runs lint, format checks, compile checks, tests, and package build.
   - `tests/test_session_route_constants_usage.py` (session manager route-constant usage enforcement),
   - `tests/test_session_upload_helper_usage.py` (session upload-input normalization helper usage enforcement),
   - `tests/test_session_upload_metadata_usage.py` (session upload-helper shared operation-metadata prefix usage enforcement),
+  - `tests/test_session_utils_helper_usage.py` (session parsing helper usage enforcement),
   - `tests/test_start_and_wait_default_constants_usage.py` (shared start-and-wait default-constant usage enforcement),
   - `tests/test_start_job_context_helper_usage.py` (shared started-job context helper usage enforcement),
   - `tests/test_started_job_helper_boundary.py` (centralization boundary enforcement for started-job helper primitives),

tests/test_architecture_marker_usage.py

@@ -159,6 +159,7 @@
     "tests/test_session_route_constants_usage.py",
     "tests/test_session_upload_helper_usage.py",
     "tests/test_session_upload_metadata_usage.py",
+    "tests/test_session_utils_helper_usage.py",
     "tests/test_start_and_wait_default_constants_usage.py",
     "tests/test_start_job_context_helper_usage.py",
     "tests/test_started_job_helper_boundary.py",

tests/test_session_utils_helper_usage.py

@@ -0,0 +1,15 @@
+from pathlib import Path
+
+import pytest
+
+pytestmark = pytest.mark.architecture
+
+SESSION_UTILS_MODULE = Path("hyperbrowser/client/managers/session_utils.py")
+
+
+def test_session_utils_uses_shared_parse_helpers():
+    module_text = SESSION_UTILS_MODULE.read_text(encoding="utf-8")
+
+    assert "parse_response_model(" in module_text
+    assert "read_plain_list_items(" in module_text
+    assert "parse_mapping_list_items(" in module_text