Adding documentation on defining the current lineage

[julienledem]

Problem

Mission documentation on the lineage versioning logic.

Solution

Add documentation on the lineage versioning logic.

Checklist

• You've signed-off your work
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've updated the CHANGELOG.md with details about your change under the "Unreleased" section (if relevant, depending on the change, this may not be necessary)
• You've included a header in any source code files (if relevant)

[codecov]

Codecov Report

Merging #2034 (db4298e) into main (7a7a2a8) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #2034   +/-   ##
=========================================
  Coverage     78.89%   78.89%           
  Complexity     1014     1014           
=========================================
  Files           197      197           
  Lines          5548     5548           
  Branches        421      421           
=========================================
  Hits           4377     4377           
  Misses          724      724           
  Partials        447      447           

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