[fix][broker] Avoid IllegalStateException when marker_type field is not set in publishing

[lhotari]

Motivation

As described in #24085, the changes in #23697 broke compatibility with existing protocol adapters.

Modifications

Avoid the IllegalStateException mentioned in #24085. This PR doesn't guarantee that there is compatibility, it simply addresses a single issue introduced by #23697 .

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.18%. Comparing base (bbc6224) to head (3260de2).
Report is 975 commits behind head on master.

Files with missing lines	Patch %	Lines
...roker/service/persistent/MessageDeduplication.java	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #24087      +/-   ##
============================================
+ Coverage     73.57%   74.18%   +0.61%     
+ Complexity    32624    32059     -565     
============================================
  Files          1877     1863      -14     
  Lines        139502   144313    +4811     
  Branches      15299    16457    +1158     
============================================
+ Hits         102638   107065    +4427     
+ Misses        28908    28793     -115     
- Partials       7956     8455     +499     

Flag	Coverage Δ
inttests	26.63% <0.00%> (+2.05%)	⬆️
systests	23.12% <0.00%> (-1.21%)	⬇️
unittests	73.69% <0.00%> (+0.85%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...roker/service/persistent/MessageDeduplication.java	76.02% <0.00%> (-4.90%)	⬇️

... and 1065 files with indirect coverage changes

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