fix: Simplify app data migration

Due to the failures related to symlinks in the repo directory that
happened when doing a full directory merge, the migration logic has been
simplified. It now only copies useful YAML files and cache data. The
repo directory is ignored and will need to be re-cloned when the user
runs `recyclarr` next time.

src/Recyclarr.Tests/Migration/Steps/MigrateTrashUpdaterAppDataDirTest.cs

@@ -4,6 +4,7 @@ using AutoFixture.NUnit3;
 using FluentAssertions;
 using NUnit.Framework;
 using Recyclarr.Migration.Steps;
+using TestLibrary;
 using TestLibrary.AutoFixture;
 
 namespace Recyclarr.Tests.Migration.Steps;
@@ -52,11 +53,19 @@ public class MigrateTrashUpdaterAppDataDirTest
         MigrateTrashUpdaterAppDataDir sut)
     {
         // Add file instead of directory since the migration step only operates on files
-        fs.AddFile(fs.Path.Combine(paths.BasePath, "trash-updater", "1", "2", "test.txt"), new MockFileData(""));
+        fs.AddFileNoData($"{paths.BasePath}/trash-updater/settings.yml");
+        fs.AddFileNoData($"{paths.BasePath}/trash-updater/recyclarr.yml");
+        fs.AddFileNoData($"{paths.BasePath}/trash-updater/this-gets-ignored.yml");
+        fs.AddDirectory2($"{paths.BasePath}/trash-updater/repo");
+        fs.AddDirectory2($"{paths.BasePath}/trash-updater/cache");
+        fs.AddFileNoData($"{paths.BasePath}/trash-updater/cache/sonarr/test.txt");
 
         sut.Execute(null);
 
         fs.AllDirectories.Should().NotContain(x => x.Contains("trash-updater"));
-        fs.AllFiles.Should().Contain(x => Regex.IsMatch(x, @"[/\\]recyclarr[/\\]1[/\\]2[/\\]test.txt$"));
+        fs.AllFiles.Should().BeEquivalentTo(
+            FileUtils.NormalizePath($"/{paths.BasePath}/recyclarr/settings.yml"),
+            FileUtils.NormalizePath($"/{paths.BasePath}/recyclarr/recyclarr.yml"),
+            FileUtils.NormalizePath($"/{paths.BasePath}/recyclarr/cache/sonarr/test.txt"));
     }
 }

src/Recyclarr/Migration/Steps/MigrateTrashUpdaterAppDataDir.cs

@@ -42,5 +42,25 @@ public class MigrateTrashUpdaterAppDataDir : IMigrationStep
 
     public bool CheckIfNeeded() => _fs.Directory.Exists(GetOldPath());
 
-    public void Execute(IConsole? console) => _fs.MergeDirectory(GetOldPath(), GetNewPath(), console);
+    public void Execute(IConsole? console)
+    {
+        _fs.MergeDirectory(
+            _fs.Path.Combine(GetOldPath(), "cache"),
+            _fs.Path.Combine(GetNewPath(), "cache"),
+            console);
+
+        MoveFile("recyclarr.yml");
+        MoveFile("settings.yml");
+
+        _fs.Directory.Delete(GetOldPath(), true);
+    }
+
+    private void MoveFile(string file)
+    {
+        var recyclarrYaml = _fs.FileInfo.FromFileName(_fs.Path.Combine(GetOldPath(), file));
+        if (recyclarrYaml.Exists)
+        {
+            recyclarrYaml.MoveTo(_fs.Path.Combine(GetNewPath(), file));
+        }
+    }
 }