feat: Add Gotify notification service and integrate it with error reporting and contact form actions, making error reporting methods asynchronous.

lib/services/app-services.ts

@@ -2,6 +2,7 @@ import type { AnalyticsService } from './analytics/analytics-service';
 import type { CacheService } from './cache/cache-service';
 import type { ErrorReportingService } from './errors/error-reporting-service';
 import type { LoggerService } from './logging/logger-service';
+import type { NotificationService } from './notifications/notification-service';
 
 // Simple constructor-based DI container.
 export class AppServices {
@@ -9,6 +10,7 @@ export class AppServices {
     public readonly analytics: AnalyticsService,
     public readonly errors: ErrorReportingService,
     public readonly cache: CacheService,
-    public readonly logger: LoggerService
+    public readonly logger: LoggerService,
+    public readonly notifications: NotificationService,
   ) {}
 }