Refactor code structure and optimize performance across multiple modules

src/__Libraries/StellaOps.Cryptography.Tests/SimRemoteProviderTests.cs

@@ -14,7 +14,8 @@ namespace StellaOps.Cryptography.Tests;
 
 public class SimRemoteProviderTests
 {
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void Supports_DefaultAlgorithms_CoversStandardIds()
     {
         var handler = new NoopHandler();
@@ -27,7 +28,8 @@ public class SimRemoteProviderTests
         Assert.True(provider.Supports(CryptoCapability.Signing, SignatureAlgorithms.Dilithium3));
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task SignAndVerify_WithSimProvider_Succeeds()
     {
         // Arrange
@@ -47,6 +49,7 @@ public class SimRemoteProviderTests
         services.AddSingleton<SimRemoteProvider>();
 
         using var providerScope = services.BuildServiceProvider();
+using StellaOps.TestKit;
         var provider = providerScope.GetRequiredService<SimRemoteProvider>();
         var signer = provider.GetSigner("pq.sim", new CryptoKeyReference("sim-key"));
         var payload = Encoding.UTF8.GetBytes("hello-sim");