Refactor code structure and optimize performance across multiple modules

src/__Tests/reachability/StellaOps.Signals.Reachability.Tests/RuntimeFactsNdjsonReaderTests.cs

@@ -11,7 +11,8 @@ namespace StellaOps.Signals.Reachability.Tests;
 
 public sealed class RuntimeFactsNdjsonReaderTests
 {
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task ReadAsync_ParsesLines()
     {
         var ndjson = """
@@ -29,7 +30,8 @@ public sealed class RuntimeFactsNdjsonReaderTests
         events[1].LoaderBase.Should().Be("0x1000");
     }
 
-    [Fact]
+    [Trait("Category", TestCategories.Unit)]
+        [Fact]
     public async Task ReadAsync_HandlesGzip()
     {
         var ndjson = """
@@ -40,6 +42,7 @@ public sealed class RuntimeFactsNdjsonReaderTests
         await using (var writer = new StreamWriter(gzip, Encoding.UTF8, leaveOpen: true))
         {
             await writer.WriteAsync(ndjson);
+using StellaOps.TestKit;
         }
 
         compressed.Position = 0;