fix c++ cursor name for linux/macos

Author: kzhdev

tests/test_atomic_cursor.py

@@ -559,8 +559,11 @@ def test_atomic_cursor_python_cpp_work_stealing_cursor_created_by_cpp():
 
     actual_queue_name = q.get_shm_name()
 
-    from slick_queue_py.atomic_ops import validate_shm_name
-    actual_cursor_name = validate_shm_name(cursor_name)  # Created by C++ process
+    # Get actual cursor name for C++ (with / prefix on POSIX)
+    if sys.platform != 'win32':
+        actual_cursor_name = '/' + cursor_name if not cursor_name.startswith('/') else cursor_name
+    else:
+        actual_cursor_name = cursor_name
 
     # Start C++ consumer process
     cpp_consumer = find_cpp_executable("cpp_work_stealing_consumer")