refactor(sentry): standardize exceptions to prevent Sentry minification

lib/features/identity_creator/data/datasource_impl/local_identity_creator_data_source_impl.dart

@@ -46,7 +46,7 @@ class LocalIdentityCreatorDataSourceImpl implements IdentityCreatorDataSource {
       if (result != null) {
         return IdentityCacheModel.fromJson(jsonDecode(result.value));
       } else {
-        throw NotFoundInWebSessionException();
+        throw const NotFoundInWebSessionException();
       }
     }).catchError(_exceptionThrower.throwException);
   }