Add StepFinished to log service

[qwerty287]

Allow to notify the log service that a step finished.

See #5507 #5482

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2046 lines in your changes missing coverage. Please review.
✅ Project coverage is 19.32%. Comparing base (7707e84) to head (8338adf).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
server/store/mocks/store.go	0.00%	1999 Missing ⚠️
server/services/log/mocks/mock_Service.go	0.00%	21 Missing ⚠️
server/store/mocks/mock_Store.go	0.00%	21 Missing ⚠️
server/grpc/rpc.go	0.00%	3 Missing ⚠️
server/services/log/file/file.go	0.00%	1 Missing ⚠️
server/store/datastore/log.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5530      +/-   ##
==========================================
- Coverage   26.32%   19.32%   -7.00%     
==========================================
  Files         405      414       +9     
  Lines       29028    39445   +10417     
==========================================
- Hits         7641     7624      -17     
- Misses      20688    31122   +10434     
  Partials      699      699              

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[xoxys]

Sorry for the conflicts 🙈 code LGTM