fix: enhance thread safety and exception handling for DFileInfo

[liyigang1]

Made mutex mutable to allow thread-safe access in const methods Added comprehensive mutex locking for shared resource protection Implemented exception handling for GIO function calls to prevent crashes Simplified initialization logic by removing redundant early return paths Enhanced resource management with safe GFileInfo cleanup Added extensive concurrency test suite to validate thread safety improvements

Log: Fix concurrent access issues and prevent potential crashes from GIO exceptions

Influence:

1. Run concurrent access tests with multiple threads calling queryInfoSync() and attribute()
2. Perform stress tests with frequent queryInfoSync() and refreshAsync() calls
3. Verify no deadlocks occur during mixed concurrent operations
4. Test thread-safe error handling with non-existent file paths
5. Monitor for memory leaks and race conditions in production scenarios

fix: 增强 DFileInfo 线程安全性和异常处理能力

将互斥锁改为mutable以支持const方法中的线程安全访问
为共享资源添加全面的互斥锁保护
对GIO函数调用实现异常处理以防止崩溃
通过移除冗余的早期返回逻辑简化初始化流程
增强资源管理，安全清理GFileInfo
添加全面的并发测试套件以验证线程安全改进

Log: 修复并发访问问题，防止GIO异常导致的潜在崩溃

Influence:

1. 运行并发访问测试，验证多线程同时调用queryInfoSync()和attribute()
2. 执行压力测试，频繁调用queryInfoSync()和refreshAsync()
3. 验证混合并发操作中不会发生死锁
4. 测试使用不存在文件路径的线程安全错误处理
5. 在生产场景中监控内存泄漏和竞态条件

[deepin-ci-robot]

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This pull-request has been approved by: liyigang1

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