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

FictionArchive.Service.NovelService/Services/EventHandlers/NovelUpdateRequestedEventHandler.cs

@@ -0,0 +1,23 @@
+using FictionArchive.Service.NovelService.Models.IntegrationEvents;
+using FictionArchive.Service.Shared.Services.EventBus;
+
+namespace FictionArchive.Service.NovelService.Services.EventHandlers;
+
+public class NovelUpdateRequestedEventHandler : IIntegrationEventHandler<NovelUpdateRequestedEvent>
+{
+    private readonly ILogger<NovelUpdateRequestedEventHandler> _logger;
+    private readonly IEventBus _eventBus;
+    private readonly NovelUpdateService _novelUpdateService;
+
+    public NovelUpdateRequestedEventHandler(ILogger<NovelUpdateRequestedEventHandler> logger, IEventBus eventBus, NovelUpdateService novelUpdateService)
+    {
+        _logger = logger;
+        _eventBus = eventBus;
+        _novelUpdateService = novelUpdateService;
+    }
+
+    public async Task Handle(NovelUpdateRequestedEvent @event)
+    {
+        await _novelUpdateService.ImportNovel(@event.NovelUrl);
+    }
+}