[FA-4] Adds an event bus infrastructure, a RabbitMQ implementation and rewires existing mutations on NovelService to utilize it.

FictionArchive.Service.NovelService/Models/IntegrationEvents/TranslationRequestCreatedEvent.cs

@@ -0,0 +1,13 @@
+using FictionArchive.Common.Enums;
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.NovelService.Models.IntegrationEvents;
+
+public class TranslationRequestCreatedEvent : IntegrationEvent
+{
+    public Guid TranslationRequestId { get; set; }
+    public Language From { get; set; }
+    public Language To { get; set; }
+    public string Body { get; set; }
+    public string TranslationEngineKey { get; set; }
+}