Refactor code structure and optimize performance across multiple modules

src/__Tests/reachability/StellaOps.Reachability.FixtureTests/FixtureCoverageTests.cs

@@ -2,6 +2,8 @@ using System.Text.Json;
 using FluentAssertions;
 using Xunit;
 
+
+using StellaOps.TestKit;
 namespace StellaOps.Reachability.FixtureTests;
 
 public sealed class FixtureCoverageTests
@@ -11,7 +13,8 @@ public sealed class FixtureCoverageTests
     private static readonly string CorpusRoot = Path.Combine(ReachabilityRoot, "corpus");
     private static readonly string SamplesPublicRoot = Path.Combine(ReachabilityRoot, "samples-public");
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void CorpusAndPublicSamplesCoverExpectedLanguageBuckets()
     {
         var corpusLanguages = ReadManifestLanguages(Path.Combine(CorpusRoot, "manifest.json"));
@@ -21,7 +24,8 @@ public sealed class FixtureCoverageTests
         samplesLanguages.Should().Contain(new[] { "csharp", "js", "php" });
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void CorpusManifestIsSorted()
     {
         var keys = ReadManifestKeys(Path.Combine(CorpusRoot, "manifest.json"));