feat: execute full-repo remaining parity closure plan

src/NATS.Server/JetStream/Storage/FileStoreOptions.cs

@@ -5,4 +5,7 @@ public sealed class FileStoreOptions
     public string Directory { get; set; } = string.Empty;
     public int BlockSizeBytes { get; set; } = 64 * 1024;
     public int MaxAgeMs { get; set; }
+    public bool EnableCompression { get; set; }
+    public bool EnableEncryption { get; set; }
+    public byte[]? EncryptionKey { get; set; }
 }