[#23] Client: Refactoring to optimize memory usage

Signed-off-by: Pavel Gross <p.gross@yando.com>

src/FrostFS.SDK.ClientV2/Models/Object/SplitId.cs

@@ -0,0 +1,62 @@
+using FrostFS.SDK.Cryptography;
+
+using Google.Protobuf;
+
+using System;
+
+namespace FrostFS.SDK;
+
+public class SplitId
+{
+    private readonly Guid id;
+
+    private ByteString? _message;
+
+    public SplitId()
+    {
+        id = Guid.NewGuid();
+    }
+
+    public SplitId(Guid guid)
+    {
+        id = guid;
+    }
+
+    private SplitId(byte[] binary)
+    {
+        id = new Guid(binary);
+    }
+
+    private SplitId(string str)
+    {
+        id = new Guid(str);
+    }
+
+    public static SplitId CreateFromBinary(byte[] binaryData)
+    {
+        return new SplitId(binaryData);
+    }
+
+    public static SplitId CreateFromString(string stringData)
+    {
+        return new SplitId(stringData);
+    }
+
+    public override string ToString()
+    {
+        return id.ToString();
+    }
+
+    public byte[]? ToBinary()
+    {
+        if (id == Guid.Empty)
+            return null;
+
+        return id.ToBytes();
+    }
+
+    public ByteString? GetSplitId()
+    {
+        return _message ??= ByteString.CopyFrom(ToBinary());
+    }
+}