refactor: centralize domain values and enforce numeric lint

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

@@ -15,6 +15,8 @@ import { decimal } from '../../../../../integrations/tbank/decimal';
 import { optional, timestamp } from '../../application/instrument-market';
 import { StockDto, StockSearchResultDto } from '../presentation/stock.dto';
 
+const SEARCH_RESULTS_LIMIT = 30;
+
 type IdentifiedShare = TbankShare & { uid: string };
 
 @Injectable()
@@ -30,7 +32,7 @@ export class StockCatalogService {
   search(userId: string, query: string): Promise<StockSearchResultDto[]> {
     return this.cached(userId, `search:${query}`, async (token) => {
       const found = await this.tbank.findShares(token, query);
-      const shares = selectShares(found, query).slice(0, 30);
+      const shares = selectShares(found, query).slice(0, SEARCH_RESULTS_LIMIT);
       if (!shares.length) return [];
       // One market-data request for the list; failed enrichment must not hide a catalog result.
       const [details, prices] = await Promise.all([