add skew_symmetric_wrap and symmetric_wrap to ATOM_CONVERTERS

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Transurgeon

cvxpy/reductions/solvers/nlp_solvers/diff_engine/registry.py

@@ -220,6 +220,8 @@ def convert_upper_tri(_expr, children):
     "psd_wrap": lambda _expr, children: children[0],
     "nsd_wrap": lambda _expr, children: children[0],
     "hermitian_wrap": lambda _expr, children: children[0],
+    "skew_symmetric_wrap": lambda _expr, children: children[0],
+    "symmetric_wrap": lambda _expr, children: children[0],
     # Division by constant
     "DivExpression": convert_div,
     # N-ary (handles 2+ args)