Add tune_lgbm() and wire hyperparameter tuning into DAG

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Converts scratch/tune_model.R into a pure tune_lgbm() function,
replacing hardcoded winning_params with a fully automated tar_target.
Best params (trees=844, depth=3, lr=0.0204, min_n=389) now flow
reproducibly into evaluate_final_model() and train_production_model().
PR-AUC improved from 0.165 to 0.198.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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This commit is contained in:

Rob Wiederstein

2026-02-22 03:25:35 -05:00

parent 33d0fc31c7

commit f47b2e1be2

7 changed files with 178 additions and 9 deletions

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