Add PreprocessingBehavior for action command pipeline

Introduced PreprocessingBehavior implementing MediatR's IPipelineBehavior for InvokeRecActionViewCommand. This behavior executes a preprocessing SQL query if specified, and halts processing if an error occurs and ErrorAction is set to Stop. Added necessary using directives for dependencies.

src/ReC.Application/Common/Behaviors/Action/PreprocessingBehavior.cs

@@ -0,0 +1,29 @@
+using DigitalData.Core.Abstraction.Application.Repository;
+using MediatR;
+using ReC.Application.Common.Interfaces;
+using ReC.Application.RecActions.Commands;
+using ReC.Domain.Constants;
+
+namespace ReC.Application.Common.Behaviors.Action;
+
+public class PreprocessingBehavior(IRecDbContext context, ISender sender) : IPipelineBehavior<InvokeRecActionViewCommand, bool>
+{
+    public async Task<bool> Handle(InvokeRecActionViewCommand request, RequestHandlerDelegate<bool> next, CancellationToken cancel)
+    {
+        try
+        {
+            if (request.Action.PreprocessingQuery is string query)
+                await context.ExecuteDynamicSqlAsync(query);
+        }
+        catch (Exception ex)
+        {
+            if(request.Action.ErrorAction == ErrorAction.Stop)
+            {
+                // save output result
+                return false;
+            }
+        }
+
+        return await next(cancel);
+    }
+}