v2.7.3

1-4. Internal code changes
5.Fixed 500 error on POST /member/bonus/claim when config.ranks[].daily_bonus = null
-> It will now return 404 in such cases
6.Improved config validator to handle data of wrong types
7.Added ?sync_to_truckersmp to PATCH /user/profile
8.Added (creation) timestamp to challenge and event
9.Renamed config.application_types[].staff_role_id to staff_role_ids
10.Added config.announcement_types[]
{"id": int, "name": str, "staff_role_ids": list}
Note announcement_type in response has been converted from int to dict like {"id": int, "name": str}