perf(income): compute Moscow dates once

src/modules/investments/income/income-analytics.service.ts

@@ -232,13 +232,16 @@ function buckets(
   granularity: IncomeBucketGranularity,
   entries: BrokerageOperationDto[],
 ) {
+  const datedEntries = entries.map((entry) => ({
+    entry,
+    date: moscowDate(new Date(entry.occurredAt)),
+  }));
   return rangeBuckets(range, granularity).map((period) => ({
     period,
     totalsByCurrency: totals(
-      entries.filter((entry) => {
-        const date = moscowDate(new Date(entry.occurredAt));
-        return date >= period.from && date <= period.to;
-      }),
+      datedEntries
+        .filter(({ date }) => date >= period.from && date <= period.to)
+        .map(({ entry }) => entry),
     ),
   }));
 }