fix: add traceability comment to test_returns_both_named_and_anonymous (#336)

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

Author: nhorton

tests/unit/deepschema/test_matcher.py

@@ -133,6 +133,8 @@ def test_skips_anonymous_schema_with_parse_error(self, tmp_path: Path) -> None:
         result = get_schemas_for_file_fast("src/app.py", tmp_path)
         assert result == []
 
+    # THIS TEST VALIDATES A HARD REQUIREMENT (DW-REQ-011.6).
+    # YOU MUST NOT MODIFY THIS TEST UNLESS THE REQUIREMENT CHANGES
     def test_returns_both_named_and_anonymous(self, tmp_path: Path) -> None:
         """When both a named and anonymous schema apply, both are returned."""
         # Named schema matching *.yml files