docs: Clarify ML folder purpose in README

[makseq]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.70%. Comparing base (c9b6b5d) to head (2bf0f01).
⚠️ Report is 136 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #8391       +/-   ##
============================================
+ Coverage    66.79%   78.70%   +11.91%     
============================================
  Files          773      230      -543     
  Lines        58189    19940    -38249     
  Branches     10090        0    -10090     
============================================
- Hits         38867    15694    -23173     
+ Misses       19319     4246    -15073     
+ Partials         3        0        -3     

Flag	Coverage Δ
lsf-e2e	?
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lsf-unit	?
pytests	78.70% <ø> (ø)

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