feat: Implement Policy Engine Evaluation Service and Cache with unit tests

Temp commit to debug

src/Scanner/StellaOps.Scanner.WebService/Serialization/OrchestratorEventSerializer.cs

@@ -207,10 +207,7 @@ internal static class OrchestratorEventSerializer
                 return;
             }
 
-            info.PolymorphismOptions ??= new JsonPolymorphismOptions
-            {
-                UnknownDerivedTypeHandling = JsonUnknownDerivedTypeHandling.Fail
-            };
+            info.PolymorphismOptions ??= new JsonPolymorphismOptions();
 
             AddDerivedType(info.PolymorphismOptions, typeof(ReportReadyEventPayload));
             AddDerivedType(info.PolymorphismOptions, typeof(ScanCompletedEventPayload));