refactor: replace ignored numeric literals with constants

src/modules/investments/instruments/stocks/application/stock-catalog.service.ts

@@ -12,6 +12,8 @@ import {
   StockSearchResourceDto,
 } from '../presentation/stock.dto';
 
+const MIN_LOT_EXCLUSIVE = 0;
+
 type IdentifiedShare = TbankShare & { uid: string };
 
 @Injectable()
@@ -102,7 +104,7 @@ function stock(share: IdentifiedShare): StockDto {
     currency: share.currency?.toUpperCase() || null,
     shareType: share.shareType || null,
     sector: share.sector || null,
-    lot: share.lot && share.lot > 0 ? share.lot : null,
+    lot: share.lot && share.lot > MIN_LOT_EXCLUSIVE ? share.lot : null,
     historyFrom: timestamp(share.first_1dayCandleDate),
   };
 }