feat: execute full-repo remaining parity closure plan

src/NATS.Server/Routes/RouteCompressionCodec.cs

@@ -0,0 +1,26 @@
+using System.IO.Compression;
+
+namespace NATS.Server.Routes;
+
+public static class RouteCompressionCodec
+{
+    public static byte[] Compress(ReadOnlySpan<byte> payload)
+    {
+        using var output = new MemoryStream();
+        using (var stream = new DeflateStream(output, CompressionLevel.Fastest, leaveOpen: true))
+        {
+            stream.Write(payload);
+        }
+
+        return output.ToArray();
+    }
+
+    public static byte[] Decompress(ReadOnlySpan<byte> payload)
+    {
+        using var input = new MemoryStream(payload.ToArray());
+        using var stream = new DeflateStream(input, CompressionMode.Decompress);
+        using var output = new MemoryStream();
+        stream.CopyTo(output);
+        return output.ToArray();
+    }
+}