archive operation triggers exception in mscolab

[joernu76]

due to a too large value. The days needs to be significantly smaller to not trigger an error in a) conversion to timedelta and b) addition to "now".

File "/home/mss-mscolab/Miniforge/envs/mssenv/lib/python3.10/site-packages/mslib/mscolab/server.py", line 551, in set_last_used
    datetime.datetime.now(tz=datetime.timezone.utc) - datetime.timedelta(days=days_ago),
OverflowError: Python int too large to convert to C int

and

  File "/home/mss-mscolab/Miniforge/envs/mssenv/lib/python3.10/site-packages/mslib/mscolab/server.py", line 551, in set_last_used
    datetime.datetime.now(tz=datetime.timezone.utc) - datetime.timedelta(days=days_ago),
OverflowError: date value out of range