chore: 更新.gitignore - 排除测试和工具脚本

默认不提交:
- test_*.py, *_test.py
- diagnose_*.py, cleanup_*.py, restore_*.py
- 其他工具脚本 (*_tool.py, *_helper.py)

除非明确要求提交

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

.gitignore

@@ -61,3 +61,12 @@ captures/
 *报告*.md
 *修复*.sh
 *patch*.py
+
+# Test and utility scripts - DO NOT COMMIT unless explicitly requested
+test_*.py
+*_test.py
+diagnose_*.py
+cleanup_*.py
+restore_*.py
+*_tool.py
+*_helper.py