Refactor code structure and optimize performance across multiple modules

src/Scanner/__Tests/StellaOps.Scanner.Reachability.Tests/RichGraphPublisherTests.cs

@@ -9,7 +9,8 @@ namespace StellaOps.Scanner.Reachability.Tests;
 
 public class RichGraphPublisherTests
 {
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task PublishesGraphToCas()
     {
         var writer = new RichGraphWriter(CryptoHashFactory.CreateDefault());
@@ -46,6 +47,7 @@ public class RichGraphPublisherTests
 
         var payloadBytes = Base64UrlDecode(payloadBase64Url!);
         using var payloadDoc = JsonDocument.Parse(payloadBytes);
+using StellaOps.TestKit;
         Assert.Equal(
             result.GraphHash,
             payloadDoc.RootElement.GetProperty("hashes").GetProperty("graphHash").GetString());