fix(test): guard mcp_server tests with pytest.importorskip(mcp) for optional dep

Author: DevForge Engineer

tests/test_mcp_server.py

@@ -5,8 +5,12 @@
 import sys
 from pathlib import Path
 
+import pytest
+
 sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
 
+pytest.importorskip("mcp", reason="mcp is an optional dependency")
+
 from schemaforge.mcp_server import _FORMATS, create_server