refactor: organize chaos test runner into tools directory

Move chaos_test_runner.py to tools/ directory for better project organization
and update all Makefile targets to reference the new location. This improves
the project structure by keeping specialized tools separate from main code.

Changes:
- Move chaos_test_runner.py to tools/chaos_test_runner.py
- Update Makefile chaos-* targets to use tools/ path
- Maintain all existing functionality and CLI interface

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Makefile

@@ -254,11 +254,11 @@ release-dry-run:
 # Chaos Engineering targets
 chaos-validate:
 	@echo "🔥 Running architectural independence validation..."
-	$(VENV_PYTHON) chaos_test_runner.py validate-independence
+	$(VENV_PYTHON) tools/chaos_test_runner.py validate-independence
 
 chaos-matrix:
 	@echo "🏗️  Showing architectural dependency matrix..."
-	$(VENV_PYTHON) chaos_test_runner.py dependency-matrix
+	$(VENV_PYTHON) tools/chaos_test_runner.py dependency-matrix
 
 chaos-inject:
 	@echo "💥 Injecting chaos into layer..."
@@ -266,11 +266,11 @@ chaos-inject:
 		echo "❌ Usage: make chaos-inject LAYER=L1_Presentation TYPE=import_failure"; \
 		exit 1; \
 	fi
-	$(VENV_PYTHON) chaos_test_runner.py inject-layer-failure --layer $(LAYER) $(if $(TYPE),--injection-type $(TYPE))
+	$(VENV_PYTHON) tools/chaos_test_runner.py inject-layer-failure --layer $(LAYER) $(if $(TYPE),--injection-type $(TYPE))
 
 chaos-report:
 	@echo "📄 Generating chaos engineering report..."
-	$(VENV_PYTHON) chaos_test_runner.py chaos-report
+	$(VENV_PYTHON) tools/chaos_test_runner.py chaos-report
 
 # Code linting
 lint: $(VENV)/bin/activate