refactor: replace ignored numeric literals with constants

src/modules/investments/instruments/domain/candle-coverage.ts

@@ -1,5 +1,7 @@
 import { MILLISECONDS_PER_DAY } from '../../../../common/time';
 
+const FIRST_RANGE_END_INDEX = 1;
+
 export type CandleRange = { from: Date; to: Date };
 export type CandleCoverage = CandleRange & {
   fetchedAt: Date;
@@ -80,7 +82,7 @@ export function confirmedCandleCoverage(
     }
   }
   const sorted = [...boundaries].sort((a, b) => a - b);
-  return sorted.slice(1).map((to, index) => {
+  return sorted.slice(FIRST_RANGE_END_INDEX).map((to, index) => {
     // eslint-disable-next-line security/detect-object-injection -- The index comes from the sorted numeric boundary array.
     const from = sorted[index];
     return {