fix: resolve final CI linting issue - import sorting

- Fix import sorting in test_design_research_validation.py
- All tool description factory tests now pass
- Cache test fixed with new provider instance approach
- Secret scanning dramatically improved (16 → 3 leaks)
- Ready for PR with core functionality working

Author: Zvi Fried

tests/test_design_research_validation.py

@@ -3,9 +3,10 @@
 
 import inspect
 import os
-import pytest
 import sys
 
+import pytest
+
 from mcp_as_a_judge.server import judge_coding_plan
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "src"))