chore: fix calendar entry colors

Author: stampaaaron

apps/frontend/src/components/questionnaire/calendar/EntryCalendar.tsx

@@ -81,7 +81,8 @@ export function EntryCalendar({
           end: getDateFromTimeAndWeekday(endedAt, weekday),
           title: carer.name,
           extendedProps: { entryLanguages },
-          backgroundColor: theme.colors[theme.primaryColor][4],
+          backgroundColor: carer.color ?? theme.colors[theme.primaryColor][4],
+          borderColor: carer.color ?? theme.colors[theme.primaryColor][4],
         })),
         ...(gaps ?? []).flatMap((dailyGaps, index) =>
           dailyGaps.map((gap) => ({