Refactor code structure and optimize performance across multiple modules

src/Scanner/__Tests/StellaOps.Scanner.Integration.Tests/PoEPipelineTests.cs

@@ -11,6 +11,8 @@ using StellaOps.Scanner.Worker.Orchestration;
 using StellaOps.Signals.Storage;
 using Xunit;
 
+
+using StellaOps.TestKit;
 namespace StellaOps.Scanner.Integration.Tests;
 
 /// <summary>
@@ -41,7 +43,8 @@ public class PoEPipelineTests : IDisposable
         );
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task ScanWithVulnerability_GeneratesPoE_StoresInCas()
     {
         // Arrange
@@ -98,7 +101,8 @@ public class PoEPipelineTests : IDisposable
         Assert.Equal(dsseBytes, artifact.DsseBytes);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task ScanWithUnreachableVuln_DoesNotGeneratePoE()
     {
         // Arrange
@@ -124,7 +128,8 @@ public class PoEPipelineTests : IDisposable
         Assert.Empty(results);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task PoEGeneration_ProducesDeterministicHash()
     {
         // Arrange
@@ -141,7 +146,8 @@ public class PoEPipelineTests : IDisposable
         Assert.StartsWith("blake3:", hash1);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task PoEStorage_PersistsToCas_RetrievesCorrectly()
     {
         // Arrange