Refactor code structure and optimize performance across multiple modules

src/__Libraries/__Tests/StellaOps.AuditPack.Tests/AuditReplayE2ETests.cs

@@ -41,7 +41,8 @@ public class AuditReplayE2ETests : IDisposable
         }
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task E2E_ExportTransferReplayOffline_MatchingVerdict()
     {
         // ===== PHASE 1: EXPORT =====
@@ -146,7 +147,8 @@ public class AuditReplayE2ETests : IDisposable
         Assert.Equal(decision, replayResult.OriginalDecision);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task E2E_ReplayDetectsTamperedSbom()
     {
         // Setup
@@ -222,7 +224,8 @@ public class AuditReplayE2ETests : IDisposable
             tamperedRead.Manifest?.Inputs.SbomDigest);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task E2E_DeterministicMerkleRoot_SameInputs()
     {
         // Create identical inputs
@@ -271,7 +274,8 @@ public class AuditReplayE2ETests : IDisposable
         Assert.Equal(result1.MerkleRoot, result2.MerkleRoot);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task E2E_BundleContainsAllRequiredFiles()
     {
         // Setup
@@ -323,7 +327,8 @@ public class AuditReplayE2ETests : IDisposable
         Assert.Contains(filePaths, p => p.Contains("vex"));
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task E2E_FullCycleWithTimeAnchor()
     {
         // Setup with explicit time anchor
@@ -506,6 +511,7 @@ public class AuditReplayE2ETests : IDisposable
     private static async Task<string> ComputeFileHashAsync(string filePath)
     {
         await using var stream = File.OpenRead(filePath);
+using StellaOps.TestKit;
         var hash = await SHA256.HashDataAsync(stream);
         return Convert.ToHexString(hash).ToLowerInvariant();
     }