Prevent rec action invocation if batch has results

Add validation in InvokeRecActionViewsCommandHandler to check
for existing results before invoking rec actions for a batch.
Throw BadRequestException if results are found to avoid
duplicate processing. Add necessary using statements for
exceptions and queries.

src/ReC.Application/RecActions/Commands/InvokeBatchRecActionViewsCommand.cs

@@ -1,7 +1,9 @@
-using MediatR;
+using DigitalData.Core.Exceptions;
+using MediatR;
 using Microsoft.Extensions.Logging;
 using ReC.Application.Common.Exceptions;
 using ReC.Application.RecActions.Queries;
+using ReC.Application.Results.Queries;
 using ReC.Domain.Constants;
 
 namespace ReC.Application.RecActions.Commands;
@@ -16,6 +18,11 @@ public class InvokeRecActionViewsCommandHandler(ISender sender, ILogger<InvokeRe
 {
     public async Task Handle(InvokeBatchRecActionViewsCommand request, CancellationToken cancel)
     {
+        var any = await sender.Send(new AnyResultViewQuery(BatchId: request.References.BatchId), cancel);
+
+        if(any)
+            throw new BadRequestException($"Cannot invoke rec actions for batch {request.References.BatchId} because there are already results associated with it. Count: {any}");
+
         var actions = await sender.Send(new ReadRecActionViewQuery() { ProfileId = request.ProfileId }, cancel);
 
         foreach (var action in actions)