Implement MongoDB-based storage for Pack Run approval, artifact, log, and state management

- Added MongoPackRunApprovalStore for managing approval states with MongoDB.
- Introduced MongoPackRunArtifactUploader for uploading and storing artifacts.
- Created MongoPackRunLogStore to handle logging of pack run events.
- Developed MongoPackRunStateStore for persisting and retrieving pack run states.
- Implemented unit tests for MongoDB stores to ensure correct functionality.
- Added MongoTaskRunnerTestContext for setting up MongoDB test environment.
- Enhanced PackRunStateFactory to correctly initialize state with gate reasons.

src/Scanner/__Tests/StellaOps.Scanner.Sbomer.BuildXPlugin.Tests/TestUtilities/TestPathHelper.cs

@@ -0,0 +1,23 @@
+using System;
+using System.IO;
+
+namespace StellaOps.Scanner.Sbomer.BuildXPlugin.Tests.TestUtilities;
+
+internal static class TestPathHelper
+{
+    public static string FindRepositoryRoot()
+    {
+        var current = AppContext.BaseDirectory;
+        for (var i = 0; i < 15 && !string.IsNullOrWhiteSpace(current); i++)
+        {
+            if (File.Exists(Path.Combine(current, "global.json")))
+            {
+                return current;
+            }
+
+            current = Directory.GetParent(current)?.FullName;
+        }
+
+        throw new InvalidOperationException("Unable to locate repository root (global.json not found).");
+    }
+}