refactor: centralize domain values and enforce numeric lint

src/modules/investments/instruments/stocks/presentation/stock.dto.ts

@@ -11,25 +11,27 @@ import {
 import { MoneyDto } from '../../../../../common/money.dto';
 import { PortfolioPositionDto } from '../../../portfolio/portfolio.api';
 
+const MAX_INSTRUMENT_QUERY_LENGTH = 80;
+
 export class StockSearchQueryDto {
-  @ApiProperty({ minLength: 2, maxLength: 80 })
+  @ApiProperty({ minLength: 2, maxLength: MAX_INSTRUMENT_QUERY_LENGTH })
   @Transform(({ value }: { value: unknown }) =>
     typeof value === 'string' ? value.trim() : value,
   )
   @IsString()
   @MinLength(2)
-  @MaxLength(80)
+  @MaxLength(MAX_INSTRUMENT_QUERY_LENGTH)
   declare query: string;
 }
 export class StockTickerParamsDto {
   @ApiProperty({
     minLength: 1,
-    maxLength: 80,
+    maxLength: MAX_INSTRUMENT_QUERY_LENGTH,
     pattern: '^[A-Za-z0-9][A-Za-z0-9._@+-]*$',
   })
   @IsString()
   @MinLength(1)
-  @MaxLength(80)
+  @MaxLength(MAX_INSTRUMENT_QUERY_LENGTH)
   @Matches(/^[A-Za-z0-9][A-Za-z0-9._@+-]*$/)
   declare ticker: string;
 }