refactor: replace ignored numeric literals with constants

src/modules/auth/application/auth.service.ts

@@ -11,6 +11,8 @@ import { Session, User } from '../../../../generated/prisma/client';
 import { PrismaService } from '../../../prisma/prisma.service';
 import { AuthUser, RefreshPayload } from './auth.types';
 
+const EXPECTED_ROTATED_SESSIONS = 1;
+
 const PASSWORD_HASH_ROUNDS = 12;
 const REFRESH_TTL_MS = 604_800_000;
 
@@ -180,7 +182,7 @@ export class AuthService {
         where: { id: session.id, refreshTokenHash: expectedRefreshTokenHash },
         data,
       });
-      if (updated.count !== 1) {
+      if (updated.count !== EXPECTED_ROTATED_SESSIONS) {
         throw new UnauthorizedException({ code: 'UNAUTHORIZED' });
       }
     } else {