audit, advisories and doctors/setup work

src/Scanner/__Libraries/StellaOps.Scanner.Reachability/Explanation/PathExplanationService.cs

@@ -136,7 +136,7 @@ public sealed class PathExplanationService : IPathExplanationService
         var parts = pathId?.Split(':');
         if (parts is not { Length: >= 2 })
         {
-            return Task.FromResult<ExplainedPath?>(null);
+            return null;
         }
 
         var query = new PathExplanationQuery