fix #702

修复解压行为在包体内文件被篡改后，会无限尝试的问题。

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/Operation/internal/DownloadPackageBundleOperation.cs

@@ -95,7 +95,8 @@ namespace YooAsset
                 }
                 else
                 {
-                    if (IsWaitForAsyncComplete == false && _failedTryAgain > 0)
+                    // 注意：本地文件（解压/导入）校验失败属于确定性失败，重试只会重复读取同一文件，直接判定失败防止无限重试。
+                    if (IsWaitForAsyncComplete == false && _failedTryAgain > 0 && _unityDownloadFileOp.VerifyFailed == false)
                     {
                         _steps = ESteps.TryAgain;
                         YooLogger.Warning($"Failed download : {_unityDownloadFileOp.URL} Try again !");

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/Operation/internal/UnityDownloadFileOperation.cs

@@ -27,6 +27,12 @@ namespace YooAsset
         /// </summary>
         public int RefCount { private set; get; }
 
+        /// <summary>
+        /// 文件校验是否失败
+        /// 注意：本地文件（解压/导入）校验失败属于确定性失败，重试无意义，上层不应重试。
+        /// </summary>
+        public bool VerifyFailed { protected set; get; } = false;
+
         internal UnityDownloadFileOperation(DefaultCacheFileSystem fileSystem, PackageBundle bundle, string url) : base(url)
         {
             _fileSystem = fileSystem;

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/Operation/internal/UnityDownloadLocalFileOperation.cs

@@ -133,6 +133,8 @@ namespace YooAsset
                 }
                 else
                 {
+                    // 注意：本地内置文件被篡改或损坏时校验会失败，重试只会重复读取同一文件，因此标记为不可重试。
+                    VerifyFailed = true;
                     _steps = ESteps.Done;
                     Status = EOperationStatus.Failed;
                     Error = _verifyOperation.Error;