Handle RecActionException in middleware with 422 response

Added specific handling for RecActionException in the exception middleware. Now logs a warning with ActionId and ProfileId, returns a 422 Unprocessable Entity status, and provides detailed error information in the response.

src/ReC.API/Middleware/ExceptionHandlingMiddleware.cs

@@ -164,6 +164,22 @@ public class ExceptionHandlingMiddleware
                 };
                 break;
 
+            case RecActionException recActionEx:
+                logger.LogWarning(
+                    recActionEx,
+                    "Rec action failed. ActionId: {ActionId}, ProfileId: {ProfileId}",
+                    recActionEx.ActionId,
+                    recActionEx.ProfileId);
+
+                context.Response.StatusCode = (int)HttpStatusCode.UnprocessableEntity;
+                details = new()
+                {
+                    Title = "Rec Action Failed",
+                    Detail = recActionEx.InnerException?.Message
+                        ?? "An error occurred while executing the rec action. Check the logs for more details."
+                };
+                break;
+
             default:
                 logger.LogError(exception, "Unhandled exception occurred.");
                 context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;