Replace N sequential queries with single batch query for fetching
user default schedule IDs
Changes:
- Add getUsersScheduleDefaultIds batch method to UsersRepository
- Add getResponseSchedules batch method to OutputSchedulesService
- Extract transformScheduleToOutput for reuse
- Simplify OrganizationsSchedulesService and TeamsSchedulesService
- Remove dead code (formatInput no-op method)
Reduces database round-trips from O(n) to O(1) for schedule lookups
