Refactor code structure and optimize performance across multiple modules

src/Notify/__Tests/StellaOps.Notify.Connectors.Slack.Tests/SlackChannelTestProviderTests.cs

@@ -7,6 +7,8 @@ using StellaOps.Notify.Engine;
 using StellaOps.Notify.Models;
 using Xunit;
 
+
+using StellaOps.TestKit;
 namespace StellaOps.Notify.Connectors.Slack.Tests;
 
 public sealed class SlackChannelTestProviderTests
@@ -22,7 +24,8 @@ public sealed class SlackChannelTestProviderTests
         Metadata: new Dictionary<string, string>(),
         Attachments: new List<string>());
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task BuildPreviewAsync_ProducesDeterministicMetadata()
     {
         var provider = new SlackChannelTestProvider();
@@ -64,7 +67,8 @@ public sealed class SlackChannelTestProviderTests
         Assert.Equal(ComputeSecretHash(channel.Config.SecretRef), result.Metadata["slack.secretRef.hash"]);
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task BuildPreviewAsync_RedactsSensitiveProperties()
     {
         var provider = new SlackChannelTestProvider();