Refactor code structure and optimize performance across multiple modules

src/Graph/__Tests/StellaOps.Graph.Api.Tests/AuditLoggerTests.cs

@@ -6,7 +6,8 @@ namespace StellaOps.Graph.Api.Tests;
 
 public class AuditLoggerTests
 {
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public void LogsAndCapsSize()
     {
         var logger = new InMemoryAuditLogger();
@@ -27,6 +28,7 @@ public class AuditLoggerTests
         Assert.True(recent.Count <= 100);
         // First entry is the most recent (minute 509). Verify using total minutes from epoch.
         var minutesFromEpoch = (int)(recent.First().Timestamp - DateTimeOffset.UnixEpoch).TotalMinutes;
+using StellaOps.TestKit;
         Assert.Equal(509, minutesFromEpoch);
     }
 }