Add reported-issues, Goodreads sync & notifs

Introduce user-reported-issues and Goodreads shelf sync features and wire them into notifications. Adds Prisma migrations and schema changes (ReportedIssue, GoodreadsShelf, GoodreadsBookMapping), API endpoints for reporting (POST /audiobooks/[asin]/report-issue) and admin management (list, resolve/dismiss, replace), and an admin UI section to view/dismiss/replace reported issues. Adds a new notification event (issue_reported) with updates to notification schemas, docs and provider handling, plus a notification-events constants file. Refactors request creation to use createRequestForUser service, adds a Goodreads sync processor/service/hooks/UI modals, a scrape-resilience util, and related tests and minor integration updates.

tests/processors/send-notification.processor.test.ts

@@ -4,6 +4,7 @@
  */
 
 import { beforeEach, describe, expect, it, vi } from 'vitest';
+import type { NotificationEvent } from '@/lib/constants/notification-events';
 
 const notificationServiceMock = vi.hoisted(() => ({
   sendNotification: vi.fn(),
@@ -92,7 +93,7 @@ describe('processSendNotification', () => {
   it('processes all event types correctly', async () => {
     const { processSendNotification } = await import('@/lib/processors/send-notification.processor');
 
-    const events: Array<'request_pending_approval' | 'request_approved' | 'request_available' | 'request_error'> = [
+    const events: NotificationEvent[] = [
       'request_pending_approval',
       'request_approved',
       'request_available',