refactor: replace ignored numeric literals with constants

src/modules/banking/bank-cards/application/bank-cards.service.ts

@@ -19,6 +19,9 @@ import {
   fingerprint,
   missing,
 } from './bank-card-input';
+
+const EXPECTED_UPDATED_CARDS = 1;
+
 type Tx = Prisma.TransactionClient;
 @Injectable()
 export class BankCardsService {
@@ -149,7 +152,7 @@ export class BankCardsService {
               }),
         },
       });
-      if (changed.count !== 1) conflict();
+      if (changed.count !== EXPECTED_UPDATED_CARDS) conflict();
       return this.cardView(tx, await this.repository.card(tx, userId, id));
     });
   }