[2/2Refactor]: Spec-dec recipe lib: composable + per-model recipe

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.75%. Comparing base (c9098b6) to head (47e13f8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1412   +/-   ##
=======================================
  Coverage   76.75%   76.75%           
=======================================
  Files         476      476           
  Lines       51811    51811           
=======================================
+ Hits        39767    39769    +2     
+ Misses      12044    12042    -2     

Flag	Coverage Δ
unit	52.63% <ø> (+<0.01%)	⬆️

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