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.

src/lib/services/notification/index.ts

@@ -13,6 +13,16 @@ export type {
   ProviderMetadata,
 } from './INotificationProvider';
 
+// Centralized event constants (re-exported for convenience)
+export {
+  NOTIFICATION_EVENTS,
+  NOTIFICATION_EVENT_KEYS,
+  EVENT_LABELS,
+  getEventMeta,
+  getEventLabel,
+} from '@/lib/constants/notification-events';
+export type { NotificationSeverity, NotificationPriority, NotificationEventMeta } from '@/lib/constants/notification-events';
+
 // Core service
 export {
   NotificationService,