Refactor code structure and optimize performance across multiple modules

src/Graph/__Tests/StellaOps.Graph.Indexer.Tests/GraphAnalyticsPipelineTests.cs

@@ -6,7 +6,8 @@ namespace StellaOps.Graph.Indexer.Tests;
 
 public sealed class GraphAnalyticsPipelineTests
 {
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task RunAsync_WritesClustersAndCentrality()
     {
         var snapshot = GraphAnalyticsTestData.CreateLinearSnapshot();
@@ -15,6 +16,7 @@ public sealed class GraphAnalyticsPipelineTests
         provider.Enqueue(snapshot);
 
         using var metrics = new GraphAnalyticsMetrics();
+using StellaOps.TestKit;
         var writer = new InMemoryGraphAnalyticsWriter();
         var pipeline = new GraphAnalyticsPipeline(
             new GraphAnalyticsEngine(new GraphAnalyticsOptions()),