Support more ETL header events

[albertziegenhagel]

Similar to #68, these events are not really used yet, but having them supported in ETL tool should be beneficial anyways.

[codecov]

Codecov Report

Attention: Patch coverage is 79.16667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 83.11%. Comparing base (3118eda) to head (a3dbb10).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
snail/etl/parser/records/kernel/header.hpp	79.16%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #69      +/-   ##
==========================================
- Coverage   83.13%   83.11%   -0.03%     
==========================================
  Files         103      103              
  Lines        4607     4631      +24     
  Branches      899      899              
==========================================
+ Hits         3830     3849      +19     
- Misses        375      379       +4     
- Partials      402      403       +1     

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