Add support for setting system date and time

[max-pfeiffer]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 99.42529% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.79%. Comparing base (3affc49) to head (10b6791).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
backend/app/exceptions.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #180      +/-   ##
==========================================
+ Coverage   85.08%   86.79%   +1.70%     
==========================================
  Files          44       48       +4     
  Lines        1274     1446     +172     
==========================================
+ Hits         1084     1255     +171     
- Misses        190      191       +1     

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