refactor(types): auto -> None sweep across entire codebase

Applied 236 return type annotations to functions with no return values
across 100+ files (core modules, tests, scripts, simulations).
Added Phase 4 to python_style_refactor track for remaining 597 items
(untyped params, vars, and functions with return values).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_sim_tools.py

@@ -8,7 +8,7 @@ sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 
 from simulation.sim_tools import ToolsSimulation
 
-def test_tools_simulation_run():
+def test_tools_simulation_run() -> None:
  mock_client = MagicMock()
  mock_client.wait_for_server.return_value = True
  # Mock session entries with tool output