feat(auth): [PM-8221] implement device verification for unknown devices

Add device verification flow that requires users to enter an OTP when logging in from an unrecognized device. This includes:

- New device verification route and guard
- Email OTP verification component
- Authentication timeout handling

PM-8221

libs/auth/src/angular/login/login.component.ts

@@ -275,6 +275,12 @@ export class LoginComponent implements OnInit, OnDestroy {
       return;
     }
 
+    // Redirect to device verification if this is an unknown device
+    if (authResult.requiresDeviceVerification) {
+      await this.router.navigate(["device-verification"]);
+      return;
+    }
+
     await this.loginSuccessHandlerService.run(authResult.userId);
 
     if (authResult.forcePasswordReset != ForceSetPasswordReason.None) {