feat: add journald-friendly log format

[michaeladler]

Description

Pass structured log data to journald using its native protocol [1].

[1] https://systemd.io/JOURNAL_NATIVE_PROTOCOL/

Issues Addressed

List and link all the issues addressed by this PR.

Change Type

Please select the relevant options:

• Bug fix (non-breaking change that resolves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist

• I have read the CONTRIBUTING document.
• My changes adhere to the established code style, patterns, and best practices.
• I have added tests that demonstrate the effectiveness of my changes.
• I have updated the documentation accordingly (if applicable).
• I have added an entry in the CHANGELOG to document my changes (if applicable).

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 70.28%. Comparing base (8cc2b1f) to head (be3b387).

Files with missing lines	Patch %	Lines
cmd/wfx/cmd/root/setup.go	45.45%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #295      +/-   ##
==========================================
- Coverage   70.34%   70.28%   -0.06%     
==========================================
  Files          99       99              
  Lines        4899     4906       +7     
==========================================
+ Hits         3446     3448       +2     
- Misses       1226     1229       +3     
- Partials      227      229       +2     

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