refactor: centralize domain values and enforce numeric lint

src/modules/investments/operations/infrastructure/brokerage-operation.mapper.ts

@@ -1,3 +1,4 @@
+import { MILLISECONDS_PER_SECOND } from '../../../../common/time';
 import { formatDecimal } from '../../../../common/decimal';
 import {
   TbankMoney,
@@ -84,5 +85,7 @@ function money(value: TbankMoney | undefined) {
 function timestamp(
   value: { seconds?: string | number; nanos?: number } | undefined,
 ) {
-  return new Date(Number(value?.seconds ?? 0) * 1000).toISOString();
+  return new Date(
+    Number(value?.seconds ?? 0) * MILLISECONDS_PER_SECOND,
+  ).toISOString();
 }