feat(auth): add OTP verification for email changes on profile update

Email changes via PATCH /api/v1/auth/profile now require OTP verification
instead of updating immediately. A 6-digit code is sent to the new email
address and must be confirmed via POST /api/v1/auth/profile/verify-email
within 10 minutes. Also fixes pre-existing web valuation test failures
(formatPrice output format, removed comparables section, missing
QueryClientProvider wrapper).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/modules/auth/domain/events/email-change-requested.event.ts

@@ -0,0 +1,12 @@
+import { DomainEvent } from '@modules/shared';
+
+export class EmailChangeRequestedEvent implements DomainEvent {
+  readonly eventName = 'user.email_change_requested';
+  readonly occurredAt = new Date();
+
+  constructor(
+    public readonly aggregateId: string,
+    public readonly newEmail: string,
+    public readonly otpCode: string,
+  ) {}
+}

apps/api/src/modules/auth/domain/events/index.ts

@@ -1,2 +1,3 @@
 export { UserRegisteredEvent } from './user-registered.event';
 export { AgentVerifiedEvent } from './agent-verified.event';
+export { EmailChangeRequestedEvent } from './email-change-requested.event';