Restructure solution layout by module

src/Scanner/__Libraries/StellaOps.Scanner.Cache/ScannerCacheOptions.cs

@@ -0,0 +1,40 @@
+using System.IO;
+
+namespace StellaOps.Scanner.Cache;
+
+public sealed class ScannerCacheOptions
+{
+    private const long DefaultMaxBytes = 5L * 1024 * 1024 * 1024; // 5 GiB
+
+    public bool Enabled { get; set; } = true;
+
+    public string RootPath { get; set; } = Path.Combine("cache", "scanner");
+
+    public string LayersDirectoryName { get; set; } = "layers";
+
+    public string FileCasDirectoryName { get; set; } = "cas";
+
+    public TimeSpan LayerTtl { get; set; } = TimeSpan.FromDays(45);
+
+    public TimeSpan FileTtl { get; set; } = TimeSpan.FromDays(30);
+
+    public long MaxBytes { get; set; } = DefaultMaxBytes;
+
+    public long WarmBytesThreshold { get; set; } = DefaultMaxBytes / 5; // 20 %
+
+    public long ColdBytesThreshold { get; set; } = (DefaultMaxBytes * 4) / 5; // 80 %
+
+    public bool EnableAutoEviction { get; set; } = true;
+
+    public TimeSpan MaintenanceInterval { get; set; } = TimeSpan.FromMinutes(15);
+
+    public bool EnableFileCas { get; set; } = true;
+
+    public string? ImportDirectory { get; set; }
+
+    public string? ExportDirectory { get; set; }
+
+    public string LayersDirectoryPath => Path.Combine(RootPath, LayersDirectoryName);
+
+    public string FileCasDirectoryPath => Path.Combine(RootPath, FileCasDirectoryName);
+}