fix: save services when republished with no changes

[NilsOveTen]

part of Informasjonsforvaltning/fdk-issue-tracker#932

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.70%. Comparing base (c95b119) to head (67e1d30).

Files	Patch %	Lines
...ervice_harvester/harvester/DataServiceHarvester.kt	93.75%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #172      +/-   ##
============================================
- Coverage     77.32%   76.70%   -0.62%     
- Complexity      120      124       +4     
============================================
  Files            23       23              
  Lines           666      644      -22     
  Branches        105      105              
============================================
- Hits            515      494      -21     
+ Misses           81       79       -2     
- Partials         70       71       +1     

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